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Finding the Fourth Proportional to 77,472.60, 116,063.10 and 39,904.80

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Solution

The fourth proportional to 77,472.60, 116,063.10 and 39,904.80 is: 59,782.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,472.60 : 116,063.10 = 39,904.80 : x
  2. Step 2: Convert to fraction form
    77,472.60/116,063.10 = 39,904.80/x
  3. Step 3: Cross multiply
    77,472.60x = 116,063.10 × 39,904.80
  4. Step 4: Simplify right side
    77,472.60x = 4,631,474,792.88
  5. Step 5: Solve for x
    x = 4,631,474,792.88/77,472.60
  6. Step 6: Final answer
    x = 59,782.10

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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.