Home / 99,947.12-137,927.16-57,504.80

Finding the Fourth Proportional to 99,947.12, 137,927.16 and 57,504.80

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Solution

The fourth proportional to 99,947.12, 137,927.16 and 57,504.80 is: 79,356.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,947.12 : 137,927.16 = 57,504.80 : x
  2. Step 2: Convert to fraction form
    99,947.12/137,927.16 = 57,504.80/x
  3. Step 3: Cross multiply
    99,947.12x = 137,927.16 × 57,504.80
  4. Step 4: Simplify right side
    99,947.12x = 7,931,473,750.37
  5. Step 5: Solve for x
    x = 7,931,473,750.37/99,947.12
  6. Step 6: Final answer
    x = 79,356.70

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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.