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Finding the Fourth Proportional to 157,636.74, 217,543.95 and 86,020.69

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Solution

The fourth proportional to 157,636.74, 217,543.95 and 86,020.69 is: 118,711.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,636.74 : 217,543.95 = 86,020.69 : x
  2. Step 2: Convert to fraction form
    157,636.74/217,543.95 = 86,020.69/x
  3. Step 3: Cross multiply
    157,636.74x = 217,543.95 × 86,020.69
  4. Step 4: Simplify right side
    157,636.74x = 18,713,279,166.50
  5. Step 5: Solve for x
    x = 18,713,279,166.50/157,636.74
  6. Step 6: Final answer
    x = 118,711.41

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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.