Home / 90,065.12-124,288.70-49,779.63

Finding the Fourth Proportional to 90,065.12, 124,288.70 and 49,779.63

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Solution

The fourth proportional to 90,065.12, 124,288.70 and 49,779.63 is: 68,695.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,065.12 : 124,288.70 = 49,779.63 : x
  2. Step 2: Convert to fraction form
    90,065.12/124,288.70 = 49,779.63/x
  3. Step 3: Cross multiply
    90,065.12x = 124,288.70 × 49,779.63
  4. Step 4: Simplify right side
    90,065.12x = 6,187,045,250.28
  5. Step 5: Solve for x
    x = 6,187,045,250.28/90,065.12
  6. Step 6: Final answer
    x = 68,695.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.