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Finding the Fourth Proportional to 72,772.77, 100,420.87 and 40,935.52

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Solution

The fourth proportional to 72,772.77, 100,420.87 and 40,935.52 is: 56,487.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,772.77 : 100,420.87 = 40,935.52 : x
  2. Step 2: Convert to fraction form
    72,772.77/100,420.87 = 40,935.52/x
  3. Step 3: Cross multiply
    72,772.77x = 100,420.87 × 40,935.52
  4. Step 4: Simplify right side
    72,772.77x = 4,110,779,825.52
  5. Step 5: Solve for x
    x = 4,110,779,825.52/72,772.77
  6. Step 6: Final answer
    x = 56,487.88

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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.