Home / 128,600.55-177,466.82-72,013.95

Finding the Fourth Proportional to 128,600.55, 177,466.82 and 72,013.95

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Solution

The fourth proportional to 128,600.55, 177,466.82 and 72,013.95 is: 99,378.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,600.55 : 177,466.82 = 72,013.95 : x
  2. Step 2: Convert to fraction form
    128,600.55/177,466.82 = 72,013.95/x
  3. Step 3: Cross multiply
    128,600.55x = 177,466.82 × 72,013.95
  4. Step 4: Simplify right side
    128,600.55x = 12,780,086,342.07
  5. Step 5: Solve for x
    x = 12,780,086,342.07/128,600.55
  6. Step 6: Final answer
    x = 99,378.16

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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.