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Finding the Fourth Proportional to 101,007.18, 139,390.88 and 55,686.78

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Solution

The fourth proportional to 101,007.18, 139,390.88 and 55,686.78 is: 76,848.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,007.18 : 139,390.88 = 55,686.78 : x
  2. Step 2: Convert to fraction form
    101,007.18/139,390.88 = 55,686.78/x
  3. Step 3: Cross multiply
    101,007.18x = 139,390.88 × 55,686.78
  4. Step 4: Simplify right side
    101,007.18x = 7,762,228,990.13
  5. Step 5: Solve for x
    x = 7,762,228,990.13/101,007.18
  6. Step 6: Final answer
    x = 76,848.29

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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.