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Finding the Fourth Proportional to 77,130.88, 115,696.32 and 40,266.88

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Solution

The fourth proportional to 77,130.88, 115,696.32 and 40,266.88 is: 60,400.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,130.88 : 115,696.32 = 40,266.88 : x
  2. Step 2: Convert to fraction form
    77,130.88/115,696.32 = 40,266.88/x
  3. Step 3: Cross multiply
    77,130.88x = 115,696.32 × 40,266.88
  4. Step 4: Simplify right side
    77,130.88x = 4,658,729,833.88
  5. Step 5: Solve for x
    x = 4,658,729,833.88/77,130.88
  6. Step 6: Final answer
    x = 60,400.32

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1.5x scale

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.