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Finding the Fourth Proportional to 157,029.86, 216,694.98 and 85,409.78

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Solution

The fourth proportional to 157,029.86, 216,694.98 and 85,409.78 is: 117,862.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,029.86 : 216,694.98 = 85,409.78 : x
  2. Step 2: Convert to fraction form
    157,029.86/216,694.98 = 85,409.78/x
  3. Step 3: Cross multiply
    157,029.86x = 216,694.98 × 85,409.78
  4. Step 4: Simplify right side
    157,029.86x = 18,507,870,568.90
  5. Step 5: Solve for x
    x = 18,507,870,568.90/157,029.86
  6. Step 6: Final answer
    x = 117,862.11

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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.