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Finding the Fourth Proportional to 157,608.46, 217,500.42 and 85,990.08

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Solution

The fourth proportional to 157,608.46, 217,500.42 and 85,990.08 is: 118,666.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,608.46 : 217,500.42 = 85,990.08 : x
  2. Step 2: Convert to fraction form
    157,608.46/217,500.42 = 85,990.08/x
  3. Step 3: Cross multiply
    157,608.46x = 217,500.42 × 85,990.08
  4. Step 4: Simplify right side
    157,608.46x = 18,702,878,515.83
  5. Step 5: Solve for x
    x = 18,702,878,515.83/157,608.46
  6. Step 6: Final answer
    x = 118,666.72

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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.