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Finding the Fourth Proportional to 123,030.90, 169,786.13 and 69,312.92

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Solution

The fourth proportional to 123,030.90, 169,786.13 and 69,312.92 is: 95,653.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,030.90 : 169,786.13 = 69,312.92 : x
  2. Step 2: Convert to fraction form
    123,030.90/169,786.13 = 69,312.92/x
  3. Step 3: Cross multiply
    123,030.90x = 169,786.13 × 69,312.92
  4. Step 4: Simplify right side
    123,030.90x = 11,768,371,250.30
  5. Step 5: Solve for x
    x = 11,768,371,250.30/123,030.90
  6. Step 6: Final answer
    x = 95,653.78

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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.