Home / 87,859.16-121,155.02-75,154.41

Finding the Fourth Proportional to 87,859.16, 121,155.02 and 75,154.41

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Solution

The fourth proportional to 87,859.16, 121,155.02 and 75,154.41 is: 103,635.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,859.16 : 121,155.02 = 75,154.41 : x
  2. Step 2: Convert to fraction form
    87,859.16/121,155.02 = 75,154.41/x
  3. Step 3: Cross multiply
    87,859.16x = 121,155.02 × 75,154.41
  4. Step 4: Simplify right side
    87,859.16x = 9,105,333,670.87
  5. Step 5: Solve for x
    x = 9,105,333,670.87/87,859.16
  6. Step 6: Final answer
    x = 103,635.57

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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.