Home / 128,922.12-177,914.02-77,937.64

Finding the Fourth Proportional to 128,922.12, 177,914.02 and 77,937.64

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Solution

The fourth proportional to 128,922.12, 177,914.02 and 77,937.64 is: 107,554.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,922.12 : 177,914.02 = 77,937.64 : x
  2. Step 2: Convert to fraction form
    128,922.12/177,914.02 = 77,937.64/x
  3. Step 3: Cross multiply
    128,922.12x = 177,914.02 × 77,937.64
  4. Step 4: Simplify right side
    128,922.12x = 13,866,198,841.71
  5. Step 5: Solve for x
    x = 13,866,198,841.71/128,922.12
  6. Step 6: Final answer
    x = 107,554.85

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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.