Home / 91,005.10-136,471.20-31,810.30

Finding the Fourth Proportional to 91,005.10, 136,471.20 and 31,810.30

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Solution

The fourth proportional to 91,005.10, 136,471.20 and 31,810.30 is: 47,702.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,005.10 : 136,471.20 = 31,810.30 : x
  2. Step 2: Convert to fraction form
    91,005.10/136,471.20 = 31,810.30/x
  3. Step 3: Cross multiply
    91,005.10x = 136,471.20 × 31,810.30
  4. Step 4: Simplify right side
    91,005.10x = 4,341,189,813.36
  5. Step 5: Solve for x
    x = 4,341,189,813.36/91,005.10
  6. Step 6: Final answer
    x = 47,702.71

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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.