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Finding the Fourth Proportional to 123,901.32, 170,984.64 and 67,312.68

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Solution

The fourth proportional to 123,901.32, 170,984.64 and 67,312.68 is: 92,891.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,901.32 : 170,984.64 = 67,312.68 : x
  2. Step 2: Convert to fraction form
    123,901.32/170,984.64 = 67,312.68/x
  3. Step 3: Cross multiply
    123,901.32x = 170,984.64 × 67,312.68
  4. Step 4: Simplify right side
    123,901.32x = 11,509,434,357.24
  5. Step 5: Solve for x
    x = 11,509,434,357.24/123,901.32
  6. Step 6: Final answer
    x = 92,891.94

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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.