Home / 100,099.18-138,130.90-54,768.13

Finding the Fourth Proportional to 100,099.18, 138,130.90 and 54,768.13

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Solution

The fourth proportional to 100,099.18, 138,130.90 and 54,768.13 is: 75,576.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,099.18 : 138,130.90 = 54,768.13 : x
  2. Step 2: Convert to fraction form
    100,099.18/138,130.90 = 54,768.13/x
  3. Step 3: Cross multiply
    100,099.18x = 138,130.90 × 54,768.13
  4. Step 4: Simplify right side
    100,099.18x = 7,565,171,088.22
  5. Step 5: Solve for x
    x = 7,565,171,088.22/100,099.18
  6. Step 6: Final answer
    x = 75,576.75

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1.5x scale

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.