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Finding the Fourth Proportional to 67,430.60, 101,145.90 and 42,498.80

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Solution

The fourth proportional to 67,430.60, 101,145.90 and 42,498.80 is: 63,748.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,430.60 : 101,145.90 = 42,498.80 : x
  2. Step 2: Convert to fraction form
    67,430.60/101,145.90 = 42,498.80/x
  3. Step 3: Cross multiply
    67,430.60x = 101,145.90 × 42,498.80
  4. Step 4: Simplify right side
    67,430.60x = 4,298,579,374.92
  5. Step 5: Solve for x
    x = 4,298,579,374.92/67,430.60
  6. Step 6: Final answer
    x = 63,748.20

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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.