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Finding the Fourth Proportional to 77,058.39, 106,339.95 and 54,120.45

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Solution

The fourth proportional to 77,058.39, 106,339.95 and 54,120.45 is: 74,685.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,058.39 : 106,339.95 = 54,120.45 : x
  2. Step 2: Convert to fraction form
    77,058.39/106,339.95 = 54,120.45/x
  3. Step 3: Cross multiply
    77,058.39x = 106,339.95 × 54,120.45
  4. Step 4: Simplify right side
    77,058.39x = 5,755,165,946.98
  5. Step 5: Solve for x
    x = 5,755,165,946.98/77,058.39
  6. Step 6: Final answer
    x = 74,685.78

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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.