Home / 100,281.18-138,389.81-54,956.15

Finding the Fourth Proportional to 100,281.18, 138,389.81 and 54,956.15

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Solution

The fourth proportional to 100,281.18, 138,389.81 and 54,956.15 is: 75,840.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,281.18 : 138,389.81 = 54,956.15 : x
  2. Step 2: Convert to fraction form
    100,281.18/138,389.81 = 54,956.15/x
  3. Step 3: Cross multiply
    100,281.18x = 138,389.81 × 54,956.15
  4. Step 4: Simplify right side
    100,281.18x = 7,605,370,190.10
  5. Step 5: Solve for x
    x = 7,605,370,190.10/100,281.18
  6. Step 6: Final answer
    x = 75,840.45

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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.