Home / 99,743.79-137,643.77-54,421.76

Finding the Fourth Proportional to 99,743.79, 137,643.77 and 54,421.76

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Solution

The fourth proportional to 99,743.79, 137,643.77 and 54,421.76 is: 75,100.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,743.79 : 137,643.77 = 54,421.76 : x
  2. Step 2: Convert to fraction form
    99,743.79/137,643.77 = 54,421.76/x
  3. Step 3: Cross multiply
    99,743.79x = 137,643.77 × 54,421.76
  4. Step 4: Simplify right side
    99,743.79x = 7,490,816,216.44
  5. Step 5: Solve for x
    x = 7,490,816,216.44/99,743.79
  6. Step 6: Final answer
    x = 75,100.58

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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.