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Finding the Fourth Proportional to 159,812.90, 220,547.09 and 87,219.76

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Solution

The fourth proportional to 159,812.90, 220,547.09 and 87,219.76 is: 120,366.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,812.90 : 220,547.09 = 87,219.76 : x
  2. Step 2: Convert to fraction form
    159,812.90/220,547.09 = 87,219.76/x
  3. Step 3: Cross multiply
    159,812.90x = 220,547.09 × 87,219.76
  4. Step 4: Simplify right side
    159,812.90x = 19,236,063,925.18
  5. Step 5: Solve for x
    x = 19,236,063,925.18/159,812.90
  6. Step 6: Final answer
    x = 120,366.16

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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.