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Finding the Fourth Proportional to 77,125.80, 115,688.70 and 35,572.80

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Solution

The fourth proportional to 77,125.80, 115,688.70 and 35,572.80 is: 53,359.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,125.80 : 115,688.70 = 35,572.80 : x
  2. Step 2: Convert to fraction form
    77,125.80/115,688.70 = 35,572.80/x
  3. Step 3: Cross multiply
    77,125.80x = 115,688.70 × 35,572.80
  4. Step 4: Simplify right side
    77,125.80x = 4,115,370,987.36
  5. Step 5: Solve for x
    x = 4,115,370,987.36/77,125.80
  6. Step 6: Final answer
    x = 53,359.20

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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.