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Finding the Fourth Proportional to 106,319.40, 159,479.10 and 43,139.40

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Solution

The fourth proportional to 106,319.40, 159,479.10 and 43,139.40 is: 64,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,319.40 : 159,479.10 = 43,139.40 : x
  2. Step 2: Convert to fraction form
    106,319.40/159,479.10 = 43,139.40/x
  3. Step 3: Cross multiply
    106,319.40x = 159,479.10 × 43,139.40
  4. Step 4: Simplify right side
    106,319.40x = 6,879,832,686.54
  5. Step 5: Solve for x
    x = 6,879,832,686.54/106,319.40
  6. Step 6: Final answer
    x = 64,709.10

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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.