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Finding the Fourth Proportional to 89,233.40, 133,590.90 and 86,641.40

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Solution

The fourth proportional to 89,233.40, 133,590.90 and 86,641.40 is: 129,710.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,233.40 : 133,590.90 = 86,641.40 : x
  2. Step 2: Convert to fraction form
    89,233.40/133,590.90 = 86,641.40/x
  3. Step 3: Cross multiply
    89,233.40x = 133,590.90 × 86,641.40
  4. Step 4: Simplify right side
    89,233.40x = 11,574,502,603.26
  5. Step 5: Solve for x
    x = 11,574,502,603.26/89,233.40
  6. Step 6: Final answer
    x = 129,710.43

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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.