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Finding the Fourth Proportional to 85,880.62, 128,820.93 and 26,720.02

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Solution

The fourth proportional to 85,880.62, 128,820.93 and 26,720.02 is: 40,080.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,880.62 : 128,820.93 = 26,720.02 : x
  2. Step 2: Convert to fraction form
    85,880.62/128,820.93 = 26,720.02/x
  3. Step 3: Cross multiply
    85,880.62x = 128,820.93 × 26,720.02
  4. Step 4: Simplify right side
    85,880.62x = 3,442,097,826.02
  5. Step 5: Solve for x
    x = 3,442,097,826.02/85,880.62
  6. Step 6: Final answer
    x = 40,080.03

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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.