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Finding the Fourth Proportional to 158,283.69, 218,422.86 and 86,649.87

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Solution

The fourth proportional to 158,283.69, 218,422.86 and 86,649.87 is: 119,572.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,283.69 : 218,422.86 = 86,649.87 : x
  2. Step 2: Convert to fraction form
    158,283.69/218,422.86 = 86,649.87/x
  3. Step 3: Cross multiply
    158,283.69x = 218,422.86 × 86,649.87
  4. Step 4: Simplify right side
    158,283.69x = 18,926,312,424.03
  5. Step 5: Solve for x
    x = 18,926,312,424.03/158,283.69
  6. Step 6: Final answer
    x = 119,572.10

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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.