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Finding the Fourth Proportional to 77,455.80, 106,911.90 and 45,634.95

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Solution

The fourth proportional to 77,455.80, 106,911.90 and 45,634.95 is: 62,989.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,455.80 : 106,911.90 = 45,634.95 : x
  2. Step 2: Convert to fraction form
    77,455.80/106,911.90 = 45,634.95/x
  3. Step 3: Cross multiply
    77,455.80x = 106,911.90 × 45,634.95
  4. Step 4: Simplify right side
    77,455.80x = 4,878,919,210.91
  5. Step 5: Solve for x
    x = 4,878,919,210.91/77,455.80
  6. Step 6: Final answer
    x = 62,989.72

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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.