Home / 131,025.12-180,808.56-77,312.40

Finding the Fourth Proportional to 131,025.12, 180,808.56 and 77,312.40

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Solution

The fourth proportional to 131,025.12, 180,808.56 and 77,312.40 is: 106,687.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,025.12 : 180,808.56 = 77,312.40 : x
  2. Step 2: Convert to fraction form
    131,025.12/180,808.56 = 77,312.40/x
  3. Step 3: Cross multiply
    131,025.12x = 180,808.56 × 77,312.40
  4. Step 4: Simplify right side
    131,025.12x = 13,978,743,714.14
  5. Step 5: Solve for x
    x = 13,978,743,714.14/131,025.12
  6. Step 6: Final answer
    x = 106,687.51

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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.