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Finding the Fourth Proportional to 159,547.12, 220,176.48 and 87,929.74

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Solution

The fourth proportional to 159,547.12, 220,176.48 and 87,929.74 is: 121,343.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,547.12 : 220,176.48 = 87,929.74 : x
  2. Step 2: Convert to fraction form
    159,547.12/220,176.48 = 87,929.74/x
  3. Step 3: Cross multiply
    159,547.12x = 220,176.48 × 87,929.74
  4. Step 4: Simplify right side
    159,547.12x = 19,360,060,640.52
  5. Step 5: Solve for x
    x = 19,360,060,640.52/159,547.12
  6. Step 6: Final answer
    x = 121,343.84

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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.