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Finding the Fourth Proportional to 56,137.88, 77,470.34 and 30,987.38

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Solution

The fourth proportional to 56,137.88, 77,470.34 and 30,987.38 is: 42,762.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,137.88 : 77,470.34 = 30,987.38 : x
  2. Step 2: Convert to fraction form
    56,137.88/77,470.34 = 30,987.38/x
  3. Step 3: Cross multiply
    56,137.88x = 77,470.34 × 30,987.38
  4. Step 4: Simplify right side
    56,137.88x = 2,400,602,322.02
  5. Step 5: Solve for x
    x = 2,400,602,322.02/56,137.88
  6. Step 6: Final answer
    x = 42,762.61

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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.