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Finding the Fourth Proportional to 142,397.60, 213,304.80 and 72,316.40

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Solution

The fourth proportional to 142,397.60, 213,304.80 and 72,316.40 is: 108,326.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,397.60 : 213,304.80 = 72,316.40 : x
  2. Step 2: Convert to fraction form
    142,397.60/213,304.80 = 72,316.40/x
  3. Step 3: Cross multiply
    142,397.60x = 213,304.80 × 72,316.40
  4. Step 4: Simplify right side
    142,397.60x = 15,425,435,238.72
  5. Step 5: Solve for x
    x = 15,425,435,238.72/142,397.60
  6. Step 6: Final answer
    x = 108,326.51

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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.