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Finding the Fourth Proportional to 158,221.80, 218,346.16 and 86,602.20

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Solution

The fourth proportional to 158,221.80, 218,346.16 and 86,602.20 is: 119,511.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,221.80 : 218,346.16 = 86,602.20 : x
  2. Step 2: Convert to fraction form
    158,221.80/218,346.16 = 86,602.20/x
  3. Step 3: Cross multiply
    158,221.80x = 218,346.16 × 86,602.20
  4. Step 4: Simplify right side
    158,221.80x = 18,909,257,817.55
  5. Step 5: Solve for x
    x = 18,909,257,817.55/158,221.80
  6. Step 6: Final answer
    x = 119,511.08

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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.