Home / 128,915.76-177,572.28-91,125.04

Finding the Fourth Proportional to 128,915.76, 177,572.28 and 91,125.04

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Solution

The fourth proportional to 128,915.76, 177,572.28 and 91,125.04 is: 125,518.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,915.76 : 177,572.28 = 91,125.04 : x
  2. Step 2: Convert to fraction form
    128,915.76/177,572.28 = 91,125.04/x
  3. Step 3: Cross multiply
    128,915.76x = 177,572.28 × 91,125.04
  4. Step 4: Simplify right side
    128,915.76x = 16,181,281,117.89
  5. Step 5: Solve for x
    x = 16,181,281,117.89/128,915.76
  6. Step 6: Final answer
    x = 125,518.25

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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.