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Finding the Fourth Proportional to 77,390.88, 106,799.32 and 45,126.82

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Solution

The fourth proportional to 77,390.88, 106,799.32 and 45,126.82 is: 62,274.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,390.88 : 106,799.32 = 45,126.82 : x
  2. Step 2: Convert to fraction form
    77,390.88/106,799.32 = 45,126.82/x
  3. Step 3: Cross multiply
    77,390.88x = 106,799.32 × 45,126.82
  4. Step 4: Simplify right side
    77,390.88x = 4,819,513,689.76
  5. Step 5: Solve for x
    x = 4,819,513,689.76/77,390.88
  6. Step 6: Final answer
    x = 62,274.96

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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.