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Finding the Fourth Proportional to 142,561.60, 213,842.40 and 87,265.60

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Solution

The fourth proportional to 142,561.60, 213,842.40 and 87,265.60 is: 130,898.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,561.60 : 213,842.40 = 87,265.60 : x
  2. Step 2: Convert to fraction form
    142,561.60/213,842.40 = 87,265.60/x
  3. Step 3: Cross multiply
    142,561.60x = 213,842.40 × 87,265.60
  4. Step 4: Simplify right side
    142,561.60x = 18,661,085,341.44
  5. Step 5: Solve for x
    x = 18,661,085,341.44/142,561.60
  6. Step 6: Final answer
    x = 130,898.40

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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.