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Finding the Fourth Proportional to 158,275.72, 218,412.12 and 86,641.87

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Solution

The fourth proportional to 158,275.72, 218,412.12 and 86,641.87 is: 119,561.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,275.72 : 218,412.12 = 86,641.87 : x
  2. Step 2: Convert to fraction form
    158,275.72/218,412.12 = 86,641.87/x
  3. Step 3: Cross multiply
    158,275.72x = 218,412.12 × 86,641.87
  4. Step 4: Simplify right side
    158,275.72x = 18,923,634,507.46
  5. Step 5: Solve for x
    x = 18,923,634,507.46/158,275.72
  6. Step 6: Final answer
    x = 119,561.20

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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.