Home / 102,909.56-141,879.06-74,205.20

Finding the Fourth Proportional to 102,909.56, 141,879.06 and 74,205.20

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Solution

The fourth proportional to 102,909.56, 141,879.06 and 74,205.20 is: 102,305.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,909.56 : 141,879.06 = 74,205.20 : x
  2. Step 2: Convert to fraction form
    102,909.56/141,879.06 = 74,205.20/x
  3. Step 3: Cross multiply
    102,909.56x = 141,879.06 × 74,205.20
  4. Step 4: Simplify right side
    102,909.56x = 10,528,164,023.11
  5. Step 5: Solve for x
    x = 10,528,164,023.11/102,909.56
  6. Step 6: Final answer
    x = 102,305.01

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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.