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Finding the Fourth Proportional to 158,220.05, 218,342.87 and 85,622.88

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Solution

The fourth proportional to 158,220.05, 218,342.87 and 85,622.88 is: 118,159.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,220.05 : 218,342.87 = 85,622.88 : x
  2. Step 2: Convert to fraction form
    158,220.05/218,342.87 = 85,622.88/x
  3. Step 3: Cross multiply
    158,220.05x = 218,342.87 × 85,622.88
  4. Step 4: Simplify right side
    158,220.05x = 18,695,144,928.75
  5. Step 5: Solve for x
    x = 18,695,144,928.75/158,220.05
  6. Step 6: Final answer
    x = 118,159.14

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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.