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Finding the Fourth Proportional to 142,398.60, 213,306.30 and 72,317.40

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Solution

The fourth proportional to 142,398.60, 213,306.30 and 72,317.40 is: 108,328.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,398.60 : 213,306.30 = 72,317.40 : x
  2. Step 2: Convert to fraction form
    142,398.60/213,306.30 = 72,317.40/x
  3. Step 3: Cross multiply
    142,398.60x = 213,306.30 × 72,317.40
  4. Step 4: Simplify right side
    142,398.60x = 15,425,757,019.62
  5. Step 5: Solve for x
    x = 15,425,757,019.62/142,398.60
  6. Step 6: Final answer
    x = 108,328.01

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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.