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Finding the Fourth Proportional to 158,100.47, 218,174.01 and 86,478.95

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Solution

The fourth proportional to 158,100.47, 218,174.01 and 86,478.95 is: 119,338.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,100.47 : 218,174.01 = 86,478.95 : x
  2. Step 2: Convert to fraction form
    158,100.47/218,174.01 = 86,478.95/x
  3. Step 3: Cross multiply
    158,100.47x = 218,174.01 × 86,478.95
  4. Step 4: Simplify right side
    158,100.47x = 18,867,459,302.09
  5. Step 5: Solve for x
    x = 18,867,459,302.09/158,100.47
  6. Step 6: Final answer
    x = 119,338.41

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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.