Home / 99,758.13-137,669.23-56,743.80

Finding the Fourth Proportional to 99,758.13, 137,669.23 and 56,743.80

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Solution

The fourth proportional to 99,758.13, 137,669.23 and 56,743.80 is: 78,308.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,758.13 : 137,669.23 = 56,743.80 : x
  2. Step 2: Convert to fraction form
    99,758.13/137,669.23 = 56,743.80/x
  3. Step 3: Cross multiply
    99,758.13x = 137,669.23 × 56,743.80
  4. Step 4: Simplify right side
    99,758.13x = 7,811,874,807.94
  5. Step 5: Solve for x
    x = 7,811,874,807.94/99,758.13
  6. Step 6: Final answer
    x = 78,308.15

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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.