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Finding the Fourth Proportional to 61,920.40, 85,463.76 and 40,701.64

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Solution

The fourth proportional to 61,920.40, 85,463.76 and 40,701.64 is: 56,177.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,920.40 : 85,463.76 = 40,701.64 : x
  2. Step 2: Convert to fraction form
    61,920.40/85,463.76 = 40,701.64/x
  3. Step 3: Cross multiply
    61,920.40x = 85,463.76 × 40,701.64
  4. Step 4: Simplify right side
    61,920.40x = 3,478,515,192.57
  5. Step 5: Solve for x
    x = 3,478,515,192.57/61,920.40
  6. Step 6: Final answer
    x = 56,177.21

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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.