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Finding the Fourth Proportional to 157,439.60, 236,159.40 and 86,580.80

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Solution

The fourth proportional to 157,439.60, 236,159.40 and 86,580.80 is: 129,871.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,439.60 : 236,159.40 = 86,580.80 : x
  2. Step 2: Convert to fraction form
    157,439.60/236,159.40 = 86,580.80/x
  3. Step 3: Cross multiply
    157,439.60x = 236,159.40 × 86,580.80
  4. Step 4: Simplify right side
    157,439.60x = 20,446,869,779.52
  5. Step 5: Solve for x
    x = 20,446,869,779.52/157,439.60
  6. Step 6: Final answer
    x = 129,871.20

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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.