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Finding the Fourth Proportional to 158,124.40, 218,210.89 and 86,503.12

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Solution

The fourth proportional to 158,124.40, 218,210.89 and 86,503.12 is: 119,373.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,124.40 : 218,210.89 = 86,503.12 : x
  2. Step 2: Convert to fraction form
    158,124.40/218,210.89 = 86,503.12/x
  3. Step 3: Cross multiply
    158,124.40x = 218,210.89 × 86,503.12
  4. Step 4: Simplify right side
    158,124.40x = 18,875,921,495.66
  5. Step 5: Solve for x
    x = 18,875,921,495.66/158,124.40
  6. Step 6: Final answer
    x = 119,373.87

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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.