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Finding the Fourth Proportional to 207,117.86, 285,918.90 and 156,151.22

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Solution

The fourth proportional to 207,117.86, 285,918.90 and 156,151.22 is: 215,561.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,117.86 : 285,918.90 = 156,151.22 : x
  2. Step 2: Convert to fraction form
    207,117.86/285,918.90 = 156,151.22/x
  3. Step 3: Cross multiply
    207,117.86x = 285,918.90 × 156,151.22
  4. Step 4: Simplify right side
    207,117.86x = 44,646,585,056.06
  5. Step 5: Solve for x
    x = 44,646,585,056.06/207,117.86
  6. Step 6: Final answer
    x = 215,561.25

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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.