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Finding the Fourth Proportional to 158,565.79, 218,818.93 and 86,945.19

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Solution

The fourth proportional to 158,565.79, 218,818.93 and 86,945.19 is: 119,983.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,565.79 : 218,818.93 = 86,945.19 : x
  2. Step 2: Convert to fraction form
    158,565.79/218,818.93 = 86,945.19/x
  3. Step 3: Cross multiply
    158,565.79x = 218,818.93 × 86,945.19
  4. Step 4: Simplify right side
    158,565.79x = 19,025,253,444.45
  5. Step 5: Solve for x
    x = 19,025,253,444.45/158,565.79
  6. Step 6: Final answer
    x = 119,983.34

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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.