Home / 91,045.36-136,568.10-28,720.72

Finding the Fourth Proportional to 91,045.36, 136,568.10 and 28,720.72

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Solution

The fourth proportional to 91,045.36, 136,568.10 and 28,720.72 is: 43,081.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,045.36 : 136,568.10 = 28,720.72 : x
  2. Step 2: Convert to fraction form
    91,045.36/136,568.10 = 28,720.72/x
  3. Step 3: Cross multiply
    91,045.36x = 136,568.10 × 28,720.72
  4. Step 4: Simplify right side
    91,045.36x = 3,922,334,161.03
  5. Step 5: Solve for x
    x = 3,922,334,161.03/91,045.36
  6. Step 6: Final answer
    x = 43,081.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.