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Finding the Fourth Proportional to 142,641.60, 213,552.80 and 87,345.60

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Solution

The fourth proportional to 142,641.60, 213,552.80 and 87,345.60 is: 130,767.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,641.60 : 213,552.80 = 87,345.60 : x
  2. Step 2: Convert to fraction form
    142,641.60/213,552.80 = 87,345.60/x
  3. Step 3: Cross multiply
    142,641.60x = 213,552.80 × 87,345.60
  4. Step 4: Simplify right side
    142,641.60x = 18,652,897,447.68
  5. Step 5: Solve for x
    x = 18,652,897,447.68/142,641.60
  6. Step 6: Final answer
    x = 130,767.58

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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.