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Finding the Fourth Proportional to 103,421.67, 142,737.30 and 63,158.79

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Solution

The fourth proportional to 103,421.67, 142,737.30 and 63,158.79 is: 87,168.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,421.67 : 142,737.30 = 63,158.79 : x
  2. Step 2: Convert to fraction form
    103,421.67/142,737.30 = 63,158.79/x
  3. Step 3: Cross multiply
    103,421.67x = 142,737.30 × 63,158.79
  4. Step 4: Simplify right side
    103,421.67x = 9,015,115,155.87
  5. Step 5: Solve for x
    x = 9,015,115,155.87/103,421.67
  6. Step 6: Final answer
    x = 87,168.53

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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.