Home / 87,915.78-121,323.42-47,629.47

Finding the Fourth Proportional to 87,915.78, 121,323.42 and 47,629.47

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Solution

The fourth proportional to 87,915.78, 121,323.42 and 47,629.47 is: 65,728.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,915.78 : 121,323.42 = 47,629.47 : x
  2. Step 2: Convert to fraction form
    87,915.78/121,323.42 = 47,629.47/x
  3. Step 3: Cross multiply
    87,915.78x = 121,323.42 × 47,629.47
  4. Step 4: Simplify right side
    87,915.78x = 5,778,569,965.71
  5. Step 5: Solve for x
    x = 5,778,569,965.71/87,915.78
  6. Step 6: Final answer
    x = 65,728.47

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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.