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Finding the Fourth Proportional to 77,278.77, 106,644.66 and 47,064.08

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Solution

The fourth proportional to 77,278.77, 106,644.66 and 47,064.08 is: 64,948.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,278.77 : 106,644.66 = 47,064.08 : x
  2. Step 2: Convert to fraction form
    77,278.77/106,644.66 = 47,064.08/x
  3. Step 3: Cross multiply
    77,278.77x = 106,644.66 × 47,064.08
  4. Step 4: Simplify right side
    77,278.77x = 5,019,132,276.59
  5. Step 5: Solve for x
    x = 5,019,132,276.59/77,278.77
  6. Step 6: Final answer
    x = 64,948.40

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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.