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Finding the Fourth Proportional to 157,221.81, 216,967.05 and 85,601.70

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Solution

The fourth proportional to 157,221.81, 216,967.05 and 85,601.70 is: 118,130.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,221.81 : 216,967.05 = 85,601.70 : x
  2. Step 2: Convert to fraction form
    157,221.81/216,967.05 = 85,601.70/x
  3. Step 3: Cross multiply
    157,221.81x = 216,967.05 × 85,601.70
  4. Step 4: Simplify right side
    157,221.81x = 18,572,748,323.99
  5. Step 5: Solve for x
    x = 18,572,748,323.99/157,221.81
  6. Step 6: Final answer
    x = 118,130.86

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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.