Home / 128,346-177,113.25-70,984.41

Finding the Fourth Proportional to 128,346, 177,113.25 and 70,984.41

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Solution

The fourth proportional to 128,346, 177,113.25 and 70,984.41 is: 97,956.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,346 : 177,113.25 = 70,984.41 : x
  2. Step 2: Convert to fraction form
    128,346/177,113.25 = 70,984.41/x
  3. Step 3: Cross multiply
    128,346x = 177,113.25 × 70,984.41
  4. Step 4: Simplify right side
    128,346x = 12,572,279,554.43
  5. Step 5: Solve for x
    x = 12,572,279,554.43/128,346
  6. Step 6: Final answer
    x = 97,956.15

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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.