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Finding the Fourth Proportional to 58,947.80, 88,421.70 and 57,781.40

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Solution

The fourth proportional to 58,947.80, 88,421.70 and 57,781.40 is: 86,672.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,947.80 : 88,421.70 = 57,781.40 : x
  2. Step 2: Convert to fraction form
    58,947.80/88,421.70 = 57,781.40/x
  3. Step 3: Cross multiply
    58,947.80x = 88,421.70 × 57,781.40
  4. Step 4: Simplify right side
    58,947.80x = 5,109,129,616.38
  5. Step 5: Solve for x
    x = 5,109,129,616.38/58,947.80
  6. Step 6: Final answer
    x = 86,672.10

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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.