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Finding the Fourth Proportional to 247,005.16, 340,862.68 and 139,572.87

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Solution

The fourth proportional to 247,005.16, 340,862.68 and 139,572.87 is: 192,608.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,005.16 : 340,862.68 = 139,572.87 : x
  2. Step 2: Convert to fraction form
    247,005.16/340,862.68 = 139,572.87/x
  3. Step 3: Cross multiply
    247,005.16x = 340,862.68 × 139,572.87
  4. Step 4: Simplify right side
    247,005.16x = 47,575,181,419.72
  5. Step 5: Solve for x
    x = 47,575,181,419.72/247,005.16
  6. Step 6: Final answer
    x = 192,608.05

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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.