Home / 99,920.74-137,895.87-57,485.65

Finding the Fourth Proportional to 99,920.74, 137,895.87 and 57,485.65

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Solution

The fourth proportional to 99,920.74, 137,895.87 and 57,485.65 is: 79,333.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,920.74 : 137,895.87 = 57,485.65 : x
  2. Step 2: Convert to fraction form
    99,920.74/137,895.87 = 57,485.65/x
  3. Step 3: Cross multiply
    99,920.74x = 137,895.87 × 57,485.65
  4. Step 4: Simplify right side
    99,920.74x = 7,927,033,719.27
  5. Step 5: Solve for x
    x = 7,927,033,719.27/99,920.74
  6. Step 6: Final answer
    x = 79,333.22

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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.