Home / 87,834.78-121,211.28-47,547.72

Finding the Fourth Proportional to 87,834.78, 121,211.28 and 47,547.72

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Solution

The fourth proportional to 87,834.78, 121,211.28 and 47,547.72 is: 65,615.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,834.78 : 121,211.28 = 47,547.72 : x
  2. Step 2: Convert to fraction form
    87,834.78/121,211.28 = 47,547.72/x
  3. Step 3: Cross multiply
    87,834.78x = 121,211.28 × 47,547.72
  4. Step 4: Simplify right side
    87,834.78x = 5,763,320,002.28
  5. Step 5: Solve for x
    x = 5,763,320,002.28/87,834.78
  6. Step 6: Final answer
    x = 65,615.47

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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.