Home / 99,824.40-137,667.60-65,808.72

Finding the Fourth Proportional to 99,824.40, 137,667.60 and 65,808.72

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Solution

The fourth proportional to 99,824.40, 137,667.60 and 65,808.72 is: 90,756.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,824.40 : 137,667.60 = 65,808.72 : x
  2. Step 2: Convert to fraction form
    99,824.40/137,667.60 = 65,808.72/x
  3. Step 3: Cross multiply
    99,824.40x = 137,667.60 × 65,808.72
  4. Step 4: Simplify right side
    99,824.40x = 9,059,728,541.47
  5. Step 5: Solve for x
    x = 9,059,728,541.47/99,824.40
  6. Step 6: Final answer
    x = 90,756.65

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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.