Home / 81,023.69-121,555.13-30,423.17

Finding the Fourth Proportional to 81,023.69, 121,555.13 and 30,423.17

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Solution

The fourth proportional to 81,023.69, 121,555.13 and 30,423.17 is: 45,642.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,023.69 : 121,555.13 = 30,423.17 : x
  2. Step 2: Convert to fraction form
    81,023.69/121,555.13 = 30,423.17/x
  3. Step 3: Cross multiply
    81,023.69x = 121,555.13 × 30,423.17
  4. Step 4: Simplify right side
    81,023.69x = 3,698,091,624.47
  5. Step 5: Solve for x
    x = 3,698,091,624.47/81,023.69
  6. Step 6: Final answer
    x = 45,642.11

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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.