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Finding the Fourth Proportional to 75,172.60, 103,735.47 and 42,908.88

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Solution

The fourth proportional to 75,172.60, 103,735.47 and 42,908.88 is: 59,212.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,172.60 : 103,735.47 = 42,908.88 : x
  2. Step 2: Convert to fraction form
    75,172.60/103,735.47 = 42,908.88/x
  3. Step 3: Cross multiply
    75,172.60x = 103,735.47 × 42,908.88
  4. Step 4: Simplify right side
    75,172.60x = 4,451,172,681.91
  5. Step 5: Solve for x
    x = 4,451,172,681.91/75,172.60
  6. Step 6: Final answer
    x = 59,212.70

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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.