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Finding the Fourth Proportional to 101,479.76, 140,038.62 and 56,159.66

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Solution

The fourth proportional to 101,479.76, 140,038.62 and 56,159.66 is: 77,498.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,479.76 : 140,038.62 = 56,159.66 : x
  2. Step 2: Convert to fraction form
    101,479.76/140,038.62 = 56,159.66/x
  3. Step 3: Cross multiply
    101,479.76x = 140,038.62 × 56,159.66
  4. Step 4: Simplify right side
    101,479.76x = 7,864,520,585.88
  5. Step 5: Solve for x
    x = 7,864,520,585.88/101,479.76
  6. Step 6: Final answer
    x = 77,498.42

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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.