Home / 212,128,638.58-292,763,005.49-128,494,315.25

Finding the Fourth Proportional to 212,128,638.58, 292,763,005.49 and 128,494,315.25

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Solution

The fourth proportional to 212,128,638.58, 292,763,005.49 and 128,494,315.25 is: 177,337,591.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,128,638.58 : 292,763,005.49 = 128,494,315.25 : x
  2. Step 2: Convert to fraction form
    212,128,638.58/292,763,005.49 = 128,494,315.25/x
  3. Step 3: Cross multiply
    212,128,638.58x = 292,763,005.49 × 128,494,315.25
  4. Step 4: Simplify right side
    212,128,638.58x = 37,618,381,920,102,160
  5. Step 5: Solve for x
    x = 37,618,381,920,102,160/212,128,638.58
  6. Step 6: Final answer
    x = 177,337,591.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.