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Finding the Fourth Proportional to 157,018.95, 216,685.55 and 85,400.17

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Solution

The fourth proportional to 157,018.95, 216,685.55 and 85,400.17 is: 117,851.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,018.95 : 216,685.55 = 85,400.17 : x
  2. Step 2: Convert to fraction form
    157,018.95/216,685.55 = 85,400.17/x
  3. Step 3: Cross multiply
    157,018.95x = 216,685.55 × 85,400.17
  4. Step 4: Simplify right side
    157,018.95x = 18,504,981,296.11
  5. Step 5: Solve for x
    x = 18,504,981,296.11/157,018.95
  6. Step 6: Final answer
    x = 117,851.90

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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.