Home / 72,177.08-99,603.81-39,913.11

Finding the Fourth Proportional to 72,177.08, 99,603.81 and 39,913.11

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Solution

The fourth proportional to 72,177.08, 99,603.81 and 39,913.11 is: 55,079.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,177.08 : 99,603.81 = 39,913.11 : x
  2. Step 2: Convert to fraction form
    72,177.08/99,603.81 = 39,913.11/x
  3. Step 3: Cross multiply
    72,177.08x = 99,603.81 × 39,913.11
  4. Step 4: Simplify right side
    72,177.08x = 3,975,497,824.95
  5. Step 5: Solve for x
    x = 3,975,497,824.95/72,177.08
  6. Step 6: Final answer
    x = 55,079.79

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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.