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Finding the Fourth Proportional to 159,428, 220,020.62 and 87,808

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Solution

The fourth proportional to 159,428, 220,020.62 and 87,808 is: 121,180.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,428 : 220,020.62 = 87,808 : x
  2. Step 2: Convert to fraction form
    159,428/220,020.62 = 87,808/x
  3. Step 3: Cross multiply
    159,428x = 220,020.62 × 87,808
  4. Step 4: Simplify right side
    159,428x = 19,319,570,600.96
  5. Step 5: Solve for x
    x = 19,319,570,600.96/159,428
  6. Step 6: Final answer
    x = 121,180.54

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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.