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Finding the Fourth Proportional to 157,081.52, 216,766.08 and 85,461.62

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Solution

The fourth proportional to 157,081.52, 216,766.08 and 85,461.62 is: 117,933.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,081.52 : 216,766.08 = 85,461.62 : x
  2. Step 2: Convert to fraction form
    157,081.52/216,766.08 = 85,461.62/x
  3. Step 3: Cross multiply
    157,081.52x = 216,766.08 × 85,461.62
  4. Step 4: Simplify right side
    157,081.52x = 18,525,180,899.76
  5. Step 5: Solve for x
    x = 18,525,180,899.76/157,081.52
  6. Step 6: Final answer
    x = 117,933.55

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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.