Home / 84,911.10-127,378.80-25,751.40

Finding the Fourth Proportional to 84,911.10, 127,378.80 and 25,751.40

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Solution

The fourth proportional to 84,911.10, 127,378.80 and 25,751.40 is: 38,630.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,911.10 : 127,378.80 = 25,751.40 : x
  2. Step 2: Convert to fraction form
    84,911.10/127,378.80 = 25,751.40/x
  3. Step 3: Cross multiply
    84,911.10x = 127,378.80 × 25,751.40
  4. Step 4: Simplify right side
    84,911.10x = 3,280,182,430.32
  5. Step 5: Solve for x
    x = 3,280,182,430.32/84,911.10
  6. Step 6: Final answer
    x = 38,630.78

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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.