Home / 85,384,920.90-128,077,381.35-21,559,512.90

Finding the Fourth Proportional to 85,384,920.90, 128,077,381.35 and 21,559,512.90

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Solution

The fourth proportional to 85,384,920.90, 128,077,381.35 and 21,559,512.90 is: 32,339,269.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,384,920.90 : 128,077,381.35 = 21,559,512.90 : x
  2. Step 2: Convert to fraction form
    85,384,920.90/128,077,381.35 = 21,559,512.90/x
  3. Step 3: Cross multiply
    85,384,920.90x = 128,077,381.35 × 21,559,512.90
  4. Step 4: Simplify right side
    85,384,920.90x = 2,761,285,955,413,544
  5. Step 5: Solve for x
    x = 2,761,285,955,413,544/85,384,920.90
  6. Step 6: Final answer
    x = 32,339,269.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.