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Finding the Fourth Proportional to 157,659.40, 217,561.98 and 86,038.84

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Solution

The fourth proportional to 157,659.40, 217,561.98 and 86,038.84 is: 118,729.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,659.40 : 217,561.98 = 86,038.84 : x
  2. Step 2: Convert to fraction form
    157,659.40/217,561.98 = 86,038.84/x
  3. Step 3: Cross multiply
    157,659.40x = 217,561.98 × 86,038.84
  4. Step 4: Simplify right side
    157,659.40x = 18,718,780,387.30
  5. Step 5: Solve for x
    x = 18,718,780,387.30/157,659.40
  6. Step 6: Final answer
    x = 118,729.24

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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.