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Finding the Fourth Proportional to 131,029.59, 180,859.74 and 85,088.01

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Solution

The fourth proportional to 131,029.59, 180,859.74 and 85,088.01 is: 117,446.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,029.59 : 180,859.74 = 85,088.01 : x
  2. Step 2: Convert to fraction form
    131,029.59/180,859.74 = 85,088.01/x
  3. Step 3: Cross multiply
    131,029.59x = 180,859.74 × 85,088.01
  4. Step 4: Simplify right side
    131,029.59x = 15,388,995,365.72
  5. Step 5: Solve for x
    x = 15,388,995,365.72/131,029.59
  6. Step 6: Final answer
    x = 117,446.72

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1.5x scale

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.