Home / 72,170.29-99,594.39-39,905.74

Finding the Fourth Proportional to 72,170.29, 99,594.39 and 39,905.74

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Solution

The fourth proportional to 72,170.29, 99,594.39 and 39,905.74 is: 55,069.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,170.29 : 99,594.39 = 39,905.74 : x
  2. Step 2: Convert to fraction form
    72,170.29/99,594.39 = 39,905.74/x
  3. Step 3: Cross multiply
    72,170.29x = 99,594.39 × 39,905.74
  4. Step 4: Simplify right side
    72,170.29x = 3,974,387,490.12
  5. Step 5: Solve for x
    x = 3,974,387,490.12/72,170.29
  6. Step 6: Final answer
    x = 55,069.58

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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.