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Finding the Fourth Proportional to 113,989.79, 170,987.61 and 54,004.21

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Solution

The fourth proportional to 113,989.79, 170,987.61 and 54,004.21 is: 81,007.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,989.79 : 170,987.61 = 54,004.21 : x
  2. Step 2: Convert to fraction form
    113,989.79/170,987.61 = 54,004.21/x
  3. Step 3: Cross multiply
    113,989.79x = 170,987.61 × 54,004.21
  4. Step 4: Simplify right side
    113,989.79x = 9,234,050,797.84
  5. Step 5: Solve for x
    x = 9,234,050,797.84/113,989.79
  6. Step 6: Final answer
    x = 81,007.70

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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.