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Finding the Fourth Proportional to 74,686.88, 103,066.67 and 40,695.77

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Solution

The fourth proportional to 74,686.88, 103,066.67 and 40,695.77 is: 56,159.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,686.88 : 103,066.67 = 40,695.77 : x
  2. Step 2: Convert to fraction form
    74,686.88/103,066.67 = 40,695.77/x
  3. Step 3: Cross multiply
    74,686.88x = 103,066.67 × 40,695.77
  4. Step 4: Simplify right side
    74,686.88x = 4,194,376,778.17
  5. Step 5: Solve for x
    x = 4,194,376,778.17/74,686.88
  6. Step 6: Final answer
    x = 56,159.49

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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.