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Finding the Fourth Proportional to 158,551.98, 218,800.08 and 86,931.84

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Solution

The fourth proportional to 158,551.98, 218,800.08 and 86,931.84 is: 119,965.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,551.98 : 218,800.08 = 86,931.84 : x
  2. Step 2: Convert to fraction form
    158,551.98/218,800.08 = 86,931.84/x
  3. Step 3: Cross multiply
    158,551.98x = 218,800.08 × 86,931.84
  4. Step 4: Simplify right side
    158,551.98x = 19,020,693,546.55
  5. Step 5: Solve for x
    x = 19,020,693,546.55/158,551.98
  6. Step 6: Final answer
    x = 119,965.03

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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.