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Finding the Fourth Proportional to 91,419.60, 137,070.20 and 38,814.80

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Solution

The fourth proportional to 91,419.60, 137,070.20 and 38,814.80 is: 58,197.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,419.60 : 137,070.20 = 38,814.80 : x
  2. Step 2: Convert to fraction form
    91,419.60/137,070.20 = 38,814.80/x
  3. Step 3: Cross multiply
    91,419.60x = 137,070.20 × 38,814.80
  4. Step 4: Simplify right side
    91,419.60x = 5,320,352,398.96
  5. Step 5: Solve for x
    x = 5,320,352,398.96/91,419.60
  6. Step 6: Final answer
    x = 58,197.06

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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.