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Finding the Fourth Proportional to 157,762.12, 217,720.58 and 86,148.80

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Solution

The fourth proportional to 157,762.12, 217,720.58 and 86,148.80 is: 118,890.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,762.12 : 217,720.58 = 86,148.80 : x
  2. Step 2: Convert to fraction form
    157,762.12/217,720.58 = 86,148.80/x
  3. Step 3: Cross multiply
    157,762.12x = 217,720.58 × 86,148.80
  4. Step 4: Simplify right side
    157,762.12x = 18,756,366,702.30
  5. Step 5: Solve for x
    x = 18,756,366,702.30/157,762.12
  6. Step 6: Final answer
    x = 118,890.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.