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Finding the Fourth Proportional to 157,327.95, 217,111.72 and 85,707.80

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Solution

The fourth proportional to 157,327.95, 217,111.72 and 85,707.80 is: 118,276.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,327.95 : 217,111.72 = 85,707.80 : x
  2. Step 2: Convert to fraction form
    157,327.95/217,111.72 = 85,707.80/x
  3. Step 3: Cross multiply
    157,327.95x = 217,111.72 × 85,707.80
  4. Step 4: Simplify right side
    157,327.95x = 18,608,167,875.42
  5. Step 5: Solve for x
    x = 18,608,167,875.42/157,327.95
  6. Step 6: Final answer
    x = 118,276.30

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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.