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Finding the Fourth Proportional to 158,319.32, 218,480.60 and 86,700.72

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Solution

The fourth proportional to 158,319.32, 218,480.60 and 86,700.72 is: 119,646.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,319.32 : 218,480.60 = 86,700.72 : x
  2. Step 2: Convert to fraction form
    158,319.32/218,480.60 = 86,700.72/x
  3. Step 3: Cross multiply
    158,319.32x = 218,480.60 × 86,700.72
  4. Step 4: Simplify right side
    158,319.32x = 18,942,425,326.03
  5. Step 5: Solve for x
    x = 18,942,425,326.03/158,319.32
  6. Step 6: Final answer
    x = 119,646.96

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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.