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Finding the Fourth Proportional to 157,897.29, 217,898.31 and 85,300.20

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Solution

The fourth proportional to 157,897.29, 217,898.31 and 85,300.20 is: 117,714.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,897.29 : 217,898.31 = 85,300.20 : x
  2. Step 2: Convert to fraction form
    157,897.29/217,898.31 = 85,300.20/x
  3. Step 3: Cross multiply
    157,897.29x = 217,898.31 × 85,300.20
  4. Step 4: Simplify right side
    157,897.29x = 18,586,769,422.66
  5. Step 5: Solve for x
    x = 18,586,769,422.66/157,897.29
  6. Step 6: Final answer
    x = 117,714.30

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1.5x scale

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.