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Finding the Fourth Proportional to 158,659.70, 218,948.73 and 87,040.40

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Solution

The fourth proportional to 158,659.70, 218,948.73 and 87,040.40 is: 120,114.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,659.70 : 218,948.73 = 87,040.40 : x
  2. Step 2: Convert to fraction form
    158,659.70/218,948.73 = 87,040.40/x
  3. Step 3: Cross multiply
    158,659.70x = 218,948.73 × 87,040.40
  4. Step 4: Simplify right side
    158,659.70x = 19,057,385,038.69
  5. Step 5: Solve for x
    x = 19,057,385,038.69/158,659.70
  6. Step 6: Final answer
    x = 120,114.84

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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.