Home / 84,911.20-127,285.80-31,588.90

Finding the Fourth Proportional to 84,911.20, 127,285.80 and 31,588.90

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Solution

The fourth proportional to 84,911.20, 127,285.80 and 31,588.90 is: 47,353.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,911.20 : 127,285.80 = 31,588.90 : x
  2. Step 2: Convert to fraction form
    84,911.20/127,285.80 = 31,588.90/x
  3. Step 3: Cross multiply
    84,911.20x = 127,285.80 × 31,588.90
  4. Step 4: Simplify right side
    84,911.20x = 4,020,818,407.62
  5. Step 5: Solve for x
    x = 4,020,818,407.62/84,911.20
  6. Step 6: Final answer
    x = 47,353.22

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1.5x scale

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.