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Finding the Fourth Proportional to 85,883.20, 128,834.40 and 26,718.40

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Solution

The fourth proportional to 85,883.20, 128,834.40 and 26,718.40 is: 40,080.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,883.20 : 128,834.40 = 26,718.40 : x
  2. Step 2: Convert to fraction form
    85,883.20/128,834.40 = 26,718.40/x
  3. Step 3: Cross multiply
    85,883.20x = 128,834.40 × 26,718.40
  4. Step 4: Simplify right side
    85,883.20x = 3,442,249,032.96
  5. Step 5: Solve for x
    x = 3,442,249,032.96/85,883.20
  6. Step 6: Final answer
    x = 40,080.59

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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.