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Finding the Fourth Proportional to 77,953.78, 116,876.24 and 39,929.20

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Solution

The fourth proportional to 77,953.78, 116,876.24 and 39,929.20 is: 59,865.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,953.78 : 116,876.24 = 39,929.20 : x
  2. Step 2: Convert to fraction form
    77,953.78/116,876.24 = 39,929.20/x
  3. Step 3: Cross multiply
    77,953.78x = 116,876.24 × 39,929.20
  4. Step 4: Simplify right side
    77,953.78x = 4,666,774,762.21
  5. Step 5: Solve for x
    x = 4,666,774,762.21/77,953.78
  6. Step 6: Final answer
    x = 59,865.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.