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Finding the Fourth Proportional to 56,188.78, 77,540.78 and 30,695.51

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Solution

The fourth proportional to 56,188.78, 77,540.78 and 30,695.51 is: 42,359.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,188.78 : 77,540.78 = 30,695.51 : x
  2. Step 2: Convert to fraction form
    56,188.78/77,540.78 = 30,695.51/x
  3. Step 3: Cross multiply
    56,188.78x = 77,540.78 × 30,695.51
  4. Step 4: Simplify right side
    56,188.78x = 2,380,154,058.49
  5. Step 5: Solve for x
    x = 2,380,154,058.49/56,188.78
  6. Step 6: Final answer
    x = 42,359.95

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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.