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Finding the Fourth Proportional to 114,680.80, 172,021.20 and 106,386.40

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Solution

The fourth proportional to 114,680.80, 172,021.20 and 106,386.40 is: 159,579.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,680.80 : 172,021.20 = 106,386.40 : x
  2. Step 2: Convert to fraction form
    114,680.80/172,021.20 = 106,386.40/x
  3. Step 3: Cross multiply
    114,680.80x = 172,021.20 × 106,386.40
  4. Step 4: Simplify right side
    114,680.80x = 18,300,716,191.68
  5. Step 5: Solve for x
    x = 18,300,716,191.68/114,680.80
  6. Step 6: Final answer
    x = 159,579.60

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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.