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Finding the Fourth Proportional to 243,781.79, 365,607.14 and 85,989.47

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Solution

The fourth proportional to 243,781.79, 365,607.14 and 85,989.47 is: 128,961.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,781.79 : 365,607.14 = 85,989.47 : x
  2. Step 2: Convert to fraction form
    243,781.79/365,607.14 = 85,989.47/x
  3. Step 3: Cross multiply
    243,781.79x = 365,607.14 × 85,989.47
  4. Step 4: Simplify right side
    243,781.79x = 31,438,361,938.83
  5. Step 5: Solve for x
    x = 31,438,361,938.83/243,781.79
  6. Step 6: Final answer
    x = 128,961.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.