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Finding the Fourth Proportional to 158,612.43, 218,886.85 and 86,015.46

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Solution

The fourth proportional to 158,612.43, 218,886.85 and 86,015.46 is: 118,702.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,612.43 : 218,886.85 = 86,015.46 : x
  2. Step 2: Convert to fraction form
    158,612.43/218,886.85 = 86,015.46/x
  3. Step 3: Cross multiply
    158,612.43x = 218,886.85 × 86,015.46
  4. Step 4: Simplify right side
    158,612.43x = 18,827,653,960.48
  5. Step 5: Solve for x
    x = 18,827,653,960.48/158,612.43
  6. Step 6: Final answer
    x = 118,702.26

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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.