Home / 84,281.45-126,440.65-31,690.94

Finding the Fourth Proportional to 84,281.45, 126,440.65 and 31,690.94

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Solution

The fourth proportional to 84,281.45, 126,440.65 and 31,690.94 is: 47,543.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,281.45 : 126,440.65 = 31,690.94 : x
  2. Step 2: Convert to fraction form
    84,281.45/126,440.65 = 31,690.94/x
  3. Step 3: Cross multiply
    84,281.45x = 126,440.65 × 31,690.94
  4. Step 4: Simplify right side
    84,281.45x = 4,007,022,637.47
  5. Step 5: Solve for x
    x = 4,007,022,637.47/84,281.45
  6. Step 6: Final answer
    x = 47,543.35

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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.