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Finding the Fourth Proportional to 158,151.40, 218,245.53 and 86,531.20

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Solution

The fourth proportional to 158,151.40, 218,245.53 and 86,531.20 is: 119,411.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,151.40 : 218,245.53 = 86,531.20 : x
  2. Step 2: Convert to fraction form
    158,151.40/218,245.53 = 86,531.20/x
  3. Step 3: Cross multiply
    158,151.40x = 218,245.53 × 86,531.20
  4. Step 4: Simplify right side
    158,151.40x = 18,885,047,605.54
  5. Step 5: Solve for x
    x = 18,885,047,605.54/158,151.40
  6. Step 6: Final answer
    x = 119,411.19

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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.