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Finding the Fourth Proportional to 158,140.64, 218,230.80 and 86,520.48

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Solution

The fourth proportional to 158,140.64, 218,230.80 and 86,520.48 is: 119,396.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,140.64 : 218,230.80 = 86,520.48 : x
  2. Step 2: Convert to fraction form
    158,140.64/218,230.80 = 86,520.48/x
  3. Step 3: Cross multiply
    158,140.64x = 218,230.80 × 86,520.48
  4. Step 4: Simplify right side
    158,140.64x = 18,881,433,566.78
  5. Step 5: Solve for x
    x = 18,881,433,566.78/158,140.64
  6. Step 6: Final answer
    x = 119,396.47

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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.