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Finding the Fourth Proportional to 157,135.68, 216,847.80 and 85,516.56

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Solution

The fourth proportional to 157,135.68, 216,847.80 and 85,516.56 is: 118,013.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,135.68 : 216,847.80 = 85,516.56 : x
  2. Step 2: Convert to fraction form
    157,135.68/216,847.80 = 85,516.56/x
  3. Step 3: Cross multiply
    157,135.68x = 216,847.80 × 85,516.56
  4. Step 4: Simplify right side
    157,135.68x = 18,544,077,899.57
  5. Step 5: Solve for x
    x = 18,544,077,899.57/157,135.68
  6. Step 6: Final answer
    x = 118,013.16

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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.