Home / 90,458.40-135,663.30-31,312.20

Finding the Fourth Proportional to 90,458.40, 135,663.30 and 31,312.20

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Solution

The fourth proportional to 90,458.40, 135,663.30 and 31,312.20 is: 46,959.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,458.40 : 135,663.30 = 31,312.20 : x
  2. Step 2: Convert to fraction form
    90,458.40/135,663.30 = 31,312.20/x
  3. Step 3: Cross multiply
    90,458.40x = 135,663.30 × 31,312.20
  4. Step 4: Simplify right side
    90,458.40x = 4,247,916,382.26
  5. Step 5: Solve for x
    x = 4,247,916,382.26/90,458.40
  6. Step 6: Final answer
    x = 46,959.89

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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.