Home / 90,878.52-136,166.58-31,681.56

Finding the Fourth Proportional to 90,878.52, 136,166.58 and 31,681.56

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Solution

The fourth proportional to 90,878.52, 136,166.58 and 31,681.56 is: 47,469.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,878.52 : 136,166.58 = 31,681.56 : x
  2. Step 2: Convert to fraction form
    90,878.52/136,166.58 = 31,681.56/x
  3. Step 3: Cross multiply
    90,878.52x = 136,166.58 × 31,681.56
  4. Step 4: Simplify right side
    90,878.52x = 4,313,969,674.26
  5. Step 5: Solve for x
    x = 4,313,969,674.26/90,878.52
  6. Step 6: Final answer
    x = 47,469.63

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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.