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Finding the Fourth Proportional to 157,309.48, 217,085.97 and 85,689.28

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Solution

The fourth proportional to 157,309.48, 217,085.97 and 85,689.28 is: 118,250.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,309.48 : 217,085.97 = 85,689.28 : x
  2. Step 2: Convert to fraction form
    157,309.48/217,085.97 = 85,689.28/x
  3. Step 3: Cross multiply
    157,309.48x = 217,085.97 × 85,689.28
  4. Step 4: Simplify right side
    157,309.48x = 18,601,940,467.40
  5. Step 5: Solve for x
    x = 18,601,940,467.40/157,309.48
  6. Step 6: Final answer
    x = 118,250.60

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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.