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Finding the Fourth Proportional to 85,937.52, 128,909.77 and 40,935.74

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Solution

The fourth proportional to 85,937.52, 128,909.77 and 40,935.74 is: 61,405.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,937.52 : 128,909.77 = 40,935.74 : x
  2. Step 2: Convert to fraction form
    85,937.52/128,909.77 = 40,935.74/x
  3. Step 3: Cross multiply
    85,937.52x = 128,909.77 × 40,935.74
  4. Step 4: Simplify right side
    85,937.52x = 5,277,017,189.17
  5. Step 5: Solve for x
    x = 5,277,017,189.17/85,937.52
  6. Step 6: Final answer
    x = 61,405.28

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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.