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Finding the Fourth Proportional to 158,508.90, 218,740.50 and 86,888.70

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Solution

The fourth proportional to 158,508.90, 218,740.50 and 86,888.70 is: 119,905.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,508.90 : 218,740.50 = 86,888.70 : x
  2. Step 2: Convert to fraction form
    158,508.90/218,740.50 = 86,888.70/x
  3. Step 3: Cross multiply
    158,508.90x = 218,740.50 × 86,888.70
  4. Step 4: Simplify right side
    158,508.90x = 19,006,077,682.35
  5. Step 5: Solve for x
    x = 19,006,077,682.35/158,508.90
  6. Step 6: Final answer
    x = 119,905.43

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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.