Home / 83,742.40-125,599.20-31,124.80

Finding the Fourth Proportional to 83,742.40, 125,599.20 and 31,124.80

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Solution

The fourth proportional to 83,742.40, 125,599.20 and 31,124.80 is: 46,681.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,742.40 : 125,599.20 = 31,124.80 : x
  2. Step 2: Convert to fraction form
    83,742.40/125,599.20 = 31,124.80/x
  3. Step 3: Cross multiply
    83,742.40x = 125,599.20 × 31,124.80
  4. Step 4: Simplify right side
    83,742.40x = 3,909,249,980.16
  5. Step 5: Solve for x
    x = 3,909,249,980.16/83,742.40
  6. Step 6: Final answer
    x = 46,681.85

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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.