Home / 85,589.12-128,397.36-29,423.36

Finding the Fourth Proportional to 85,589.12, 128,397.36 and 29,423.36

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Solution

The fourth proportional to 85,589.12, 128,397.36 and 29,423.36 is: 44,139.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,589.12 : 128,397.36 = 29,423.36 : x
  2. Step 2: Convert to fraction form
    85,589.12/128,397.36 = 29,423.36/x
  3. Step 3: Cross multiply
    85,589.12x = 128,397.36 × 29,423.36
  4. Step 4: Simplify right side
    85,589.12x = 3,777,881,746.33
  5. Step 5: Solve for x
    x = 3,777,881,746.33/85,589.12
  6. Step 6: Final answer
    x = 44,139.74

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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.