Home / 90,673.10-136,009.55-31,508.78

Finding the Fourth Proportional to 90,673.10, 136,009.55 and 31,508.78

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Solution

The fourth proportional to 90,673.10, 136,009.55 and 31,508.78 is: 47,263.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,673.10 : 136,009.55 = 31,508.78 : x
  2. Step 2: Convert to fraction form
    90,673.10/136,009.55 = 31,508.78/x
  3. Step 3: Cross multiply
    90,673.10x = 136,009.55 × 31,508.78
  4. Step 4: Simplify right side
    90,673.10x = 4,285,494,151.26
  5. Step 5: Solve for x
    x = 4,285,494,151.26/90,673.10
  6. Step 6: Final answer
    x = 47,263.13

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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.