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Finding the Fourth Proportional to 61,587.68, 85,027.72 and 40,403.76

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Solution

The fourth proportional to 61,587.68, 85,027.72 and 40,403.76 is: 55,781.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,587.68 : 85,027.72 = 40,403.76 : x
  2. Step 2: Convert to fraction form
    61,587.68/85,027.72 = 40,403.76/x
  3. Step 3: Cross multiply
    61,587.68x = 85,027.72 × 40,403.76
  4. Step 4: Simplify right side
    61,587.68x = 3,435,439,592.23
  5. Step 5: Solve for x
    x = 3,435,439,592.23/61,587.68
  6. Step 6: Final answer
    x = 55,781.28

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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.