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Finding the Fourth Proportional to 101,479.39, 140,038.10 and 56,159.28

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Solution

The fourth proportional to 101,479.39, 140,038.10 and 56,159.28 is: 77,497.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,479.39 : 140,038.10 = 56,159.28 : x
  2. Step 2: Convert to fraction form
    101,479.39/140,038.10 = 56,159.28/x
  3. Step 3: Cross multiply
    101,479.39x = 140,038.10 × 56,159.28
  4. Step 4: Simplify right side
    101,479.39x = 7,864,438,798.37
  5. Step 5: Solve for x
    x = 7,864,438,798.37/101,479.39
  6. Step 6: Final answer
    x = 77,497.89

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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.