Home / 90,311.46-124,511.65-77,700.09

Finding the Fourth Proportional to 90,311.46, 124,511.65 and 77,700.09

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Solution

The fourth proportional to 90,311.46, 124,511.65 and 77,700.09 is: 107,124.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,311.46 : 124,511.65 = 77,700.09 : x
  2. Step 2: Convert to fraction form
    90,311.46/124,511.65 = 77,700.09/x
  3. Step 3: Cross multiply
    90,311.46x = 124,511.65 × 77,700.09
  4. Step 4: Simplify right side
    90,311.46x = 9,674,566,683.72
  5. Step 5: Solve for x
    x = 9,674,566,683.72/90,311.46
  6. Step 6: Final answer
    x = 107,124.47

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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.