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Finding the Fourth Proportional to 158,344.15, 218,506.74 and 86,710.30

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Solution

The fourth proportional to 158,344.15, 218,506.74 and 86,710.30 is: 119,655.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,344.15 : 218,506.74 = 86,710.30 : x
  2. Step 2: Convert to fraction form
    158,344.15/218,506.74 = 86,710.30/x
  3. Step 3: Cross multiply
    158,344.15x = 218,506.74 × 86,710.30
  4. Step 4: Simplify right side
    158,344.15x = 18,946,784,977.42
  5. Step 5: Solve for x
    x = 18,946,784,977.42/158,344.15
  6. Step 6: Final answer
    x = 119,655.73

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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.