Home / 80,631.69-120,931.74-76,631.01

Finding the Fourth Proportional to 80,631.69, 120,931.74 and 76,631.01

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Solution

The fourth proportional to 80,631.69, 120,931.74 and 76,631.01 is: 114,931.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,631.69 : 120,931.74 = 76,631.01 : x
  2. Step 2: Convert to fraction form
    80,631.69/120,931.74 = 76,631.01/x
  3. Step 3: Cross multiply
    80,631.69x = 120,931.74 × 76,631.01
  4. Step 4: Simplify right side
    80,631.69x = 9,267,121,377.26
  5. Step 5: Solve for x
    x = 9,267,121,377.26/80,631.69
  6. Step 6: Final answer
    x = 114,931.50

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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.