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Finding the Fourth Proportional to 100,050.87, 138,065.04 and 54,720.03

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Solution

The fourth proportional to 100,050.87, 138,065.04 and 54,720.03 is: 75,510.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,050.87 : 138,065.04 = 54,720.03 : x
  2. Step 2: Convert to fraction form
    100,050.87/138,065.04 = 54,720.03/x
  3. Step 3: Cross multiply
    100,050.87x = 138,065.04 × 54,720.03
  4. Step 4: Simplify right side
    100,050.87x = 7,554,923,130.75
  5. Step 5: Solve for x
    x = 7,554,923,130.75/100,050.87
  6. Step 6: Final answer
    x = 75,510.82

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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.