Home / 105,423.90-158,135.85-43,139.10

Finding the Fourth Proportional to 105,423.90, 158,135.85 and 43,139.10

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Solution

The fourth proportional to 105,423.90, 158,135.85 and 43,139.10 is: 64,708.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,423.90 : 158,135.85 = 43,139.10 : x
  2. Step 2: Convert to fraction form
    105,423.90/158,135.85 = 43,139.10/x
  3. Step 3: Cross multiply
    105,423.90x = 158,135.85 × 43,139.10
  4. Step 4: Simplify right side
    105,423.90x = 6,821,838,246.74
  5. Step 5: Solve for x
    x = 6,821,838,246.74/105,423.90
  6. Step 6: Final answer
    x = 64,708.65

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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.