Home / 87,915.89-121,323.78-47,630.68

Finding the Fourth Proportional to 87,915.89, 121,323.78 and 47,630.68

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Solution

The fourth proportional to 87,915.89, 121,323.78 and 47,630.68 is: 65,730.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,915.89 : 121,323.78 = 47,630.68 : x
  2. Step 2: Convert to fraction form
    87,915.89/121,323.78 = 47,630.68/x
  3. Step 3: Cross multiply
    87,915.89x = 121,323.78 × 47,630.68
  4. Step 4: Simplify right side
    87,915.89x = 5,778,734,141.57
  5. Step 5: Solve for x
    x = 5,778,734,141.57/87,915.89
  6. Step 6: Final answer
    x = 65,730.26

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1.5x scale

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.