Home / 100,050.86-138,065.04-54,720.02

Finding the Fourth Proportional to 100,050.86, 138,065.04 and 54,720.02

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Solution

The fourth proportional to 100,050.86, 138,065.04 and 54,720.02 is: 75,510.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,050.86 : 138,065.04 = 54,720.02 : x
  2. Step 2: Convert to fraction form
    100,050.86/138,065.04 = 54,720.02/x
  3. Step 3: Cross multiply
    100,050.86x = 138,065.04 × 54,720.02
  4. Step 4: Simplify right side
    100,050.86x = 7,554,922,095.26
  5. Step 5: Solve for x
    x = 7,554,922,095.26/100,050.86
  6. Step 6: Final answer
    x = 75,510.81

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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.