Home / 143,445.10-215,167.65-86,364.40

Finding the Fourth Proportional to 143,445.10, 215,167.65 and 86,364.40

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Solution

The fourth proportional to 143,445.10, 215,167.65 and 86,364.40 is: 129,546.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,445.10 : 215,167.65 = 86,364.40 : x
  2. Step 2: Convert to fraction form
    143,445.10/215,167.65 = 86,364.40/x
  3. Step 3: Cross multiply
    143,445.10x = 215,167.65 × 86,364.40
  4. Step 4: Simplify right side
    143,445.10x = 18,582,824,991.66
  5. Step 5: Solve for x
    x = 18,582,824,991.66/143,445.10
  6. Step 6: Final answer
    x = 129,546.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.