Home / 123,479.08-170,401.65-66,890.45

Finding the Fourth Proportional to 123,479.08, 170,401.65 and 66,890.45

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Solution

The fourth proportional to 123,479.08, 170,401.65 and 66,890.45 is: 92,309.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,479.08 : 170,401.65 = 66,890.45 : x
  2. Step 2: Convert to fraction form
    123,479.08/170,401.65 = 66,890.45/x
  3. Step 3: Cross multiply
    123,479.08x = 170,401.65 × 66,890.45
  4. Step 4: Simplify right side
    123,479.08x = 11,398,243,049.24
  5. Step 5: Solve for x
    x = 11,398,243,049.24/123,479.08
  6. Step 6: Final answer
    x = 92,309.10

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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.