Home / 155,878.76-215,114.96-87,899

Finding the Fourth Proportional to 155,878.76, 215,114.96 and 87,899

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Solution

The fourth proportional to 155,878.76, 215,114.96 and 87,899 is: 121,301.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,878.76 : 215,114.96 = 87,899 : x
  2. Step 2: Convert to fraction form
    155,878.76/215,114.96 = 87,899/x
  3. Step 3: Cross multiply
    155,878.76x = 215,114.96 × 87,899
  4. Step 4: Simplify right side
    155,878.76x = 18,908,389,869.04
  5. Step 5: Solve for x
    x = 18,908,389,869.04/155,878.76
  6. Step 6: Final answer
    x = 121,301.90

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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.