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Finding the Fourth Proportional to 77,316.72, 106,911.84 and 61,373.52

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Solution

The fourth proportional to 77,316.72, 106,911.84 and 61,373.52 is: 84,865.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,316.72 : 106,911.84 = 61,373.52 : x
  2. Step 2: Convert to fraction form
    77,316.72/106,911.84 = 61,373.52/x
  3. Step 3: Cross multiply
    77,316.72x = 106,911.84 × 61,373.52
  4. Step 4: Simplify right side
    77,316.72x = 6,561,555,950.48
  5. Step 5: Solve for x
    x = 6,561,555,950.48/77,316.72
  6. Step 6: Final answer
    x = 84,865.94

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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.