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Finding the Fourth Proportional to 123,029.46, 169,780.64 and 66,440.82

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Solution

The fourth proportional to 123,029.46, 169,780.64 and 66,440.82 is: 91,688.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,029.46 : 169,780.64 = 66,440.82 : x
  2. Step 2: Convert to fraction form
    123,029.46/169,780.64 = 66,440.82/x
  3. Step 3: Cross multiply
    123,029.46x = 169,780.64 × 66,440.82
  4. Step 4: Simplify right side
    123,029.46x = 11,280,364,941.72
  5. Step 5: Solve for x
    x = 11,280,364,941.72/123,029.46
  6. Step 6: Final answer
    x = 91,688.32

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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.