Home / 99,661.59-137,480.29-61,429.19

Finding the Fourth Proportional to 99,661.59, 137,480.29 and 61,429.19

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Solution

The fourth proportional to 99,661.59, 137,480.29 and 61,429.19 is: 84,739.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,661.59 : 137,480.29 = 61,429.19 : x
  2. Step 2: Convert to fraction form
    99,661.59/137,480.29 = 61,429.19/x
  3. Step 3: Cross multiply
    99,661.59x = 137,480.29 × 61,429.19
  4. Step 4: Simplify right side
    99,661.59x = 8,445,302,014.69
  5. Step 5: Solve for x
    x = 8,445,302,014.69/99,661.59
  6. Step 6: Final answer
    x = 84,739.79

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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.