Home / 80,870.61-121,392.18-71,569.80

Finding the Fourth Proportional to 80,870.61, 121,392.18 and 71,569.80

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Solution

The fourth proportional to 80,870.61, 121,392.18 and 71,569.80 is: 107,431.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,870.61 : 121,392.18 = 71,569.80 : x
  2. Step 2: Convert to fraction form
    80,870.61/121,392.18 = 71,569.80/x
  3. Step 3: Cross multiply
    80,870.61x = 121,392.18 × 71,569.80
  4. Step 4: Simplify right side
    80,870.61x = 8,688,014,044.16
  5. Step 5: Solve for x
    x = 8,688,014,044.16/80,870.61
  6. Step 6: Final answer
    x = 107,431.04

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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.