Home / 90,879.40-136,285.98-31,698.28

Finding the Fourth Proportional to 90,879.40, 136,285.98 and 31,698.28

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Solution

The fourth proportional to 90,879.40, 136,285.98 and 31,698.28 is: 47,535.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,879.40 : 136,285.98 = 31,698.28 : x
  2. Step 2: Convert to fraction form
    90,879.40/136,285.98 = 31,698.28/x
  3. Step 3: Cross multiply
    90,879.40x = 136,285.98 × 31,698.28
  4. Step 4: Simplify right side
    90,879.40x = 4,320,031,154.11
  5. Step 5: Solve for x
    x = 4,320,031,154.11/90,879.40
  6. Step 6: Final answer
    x = 47,535.87

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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.