Home / 131,215.18-181,164.12-100,947.10

Finding the Fourth Proportional to 131,215.18, 181,164.12 and 100,947.10

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Solution

The fourth proportional to 131,215.18, 181,164.12 and 100,947.10 is: 139,374.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,215.18 : 181,164.12 = 100,947.10 : x
  2. Step 2: Convert to fraction form
    131,215.18/181,164.12 = 100,947.10/x
  3. Step 3: Cross multiply
    131,215.18x = 181,164.12 × 100,947.10
  4. Step 4: Simplify right side
    131,215.18x = 18,287,992,538.05
  5. Step 5: Solve for x
    x = 18,287,992,538.05/131,215.18
  6. Step 6: Final answer
    x = 139,374.06

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1.5x scale

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.