Home / 84,811.74-127,265.40-78,119.52

Finding the Fourth Proportional to 84,811.74, 127,265.40 and 78,119.52

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Solution

The fourth proportional to 84,811.74, 127,265.40 and 78,119.52 is: 117,223.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,811.74 : 127,265.40 = 78,119.52 : x
  2. Step 2: Convert to fraction form
    84,811.74/127,265.40 = 78,119.52/x
  3. Step 3: Cross multiply
    84,811.74x = 127,265.40 × 78,119.52
  4. Step 4: Simplify right side
    84,811.74x = 9,941,911,960.61
  5. Step 5: Solve for x
    x = 9,941,911,960.61/84,811.74
  6. Step 6: Final answer
    x = 117,223.30

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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.