Home / 80,947.90-121,531.20-51,423.40

Finding the Fourth Proportional to 80,947.90, 121,531.20 and 51,423.40

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Solution

The fourth proportional to 80,947.90, 121,531.20 and 51,423.40 is: 77,204.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,947.90 : 121,531.20 = 51,423.40 : x
  2. Step 2: Convert to fraction form
    80,947.90/121,531.20 = 51,423.40/x
  3. Step 3: Cross multiply
    80,947.90x = 121,531.20 × 51,423.40
  4. Step 4: Simplify right side
    80,947.90x = 6,249,547,510.08
  5. Step 5: Solve for x
    x = 6,249,547,510.08/80,947.90
  6. Step 6: Final answer
    x = 77,204.57

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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.