Home / 191,680.28-287,420.51-71,638.55

Finding the Fourth Proportional to 191,680.28, 287,420.51 and 71,638.55

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Solution

The fourth proportional to 191,680.28, 287,420.51 and 71,638.55 is: 107,420.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,680.28 : 287,420.51 = 71,638.55 : x
  2. Step 2: Convert to fraction form
    191,680.28/287,420.51 = 71,638.55/x
  3. Step 3: Cross multiply
    191,680.28x = 287,420.51 × 71,638.55
  4. Step 4: Simplify right side
    191,680.28x = 20,590,387,318.65
  5. Step 5: Solve for x
    x = 20,590,387,318.65/191,680.28
  6. Step 6: Final answer
    x = 107,420.48

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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.