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Finding the Fourth Proportional to 70,689.70, 105,998.10 and 26,293.60

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Solution

The fourth proportional to 70,689.70, 105,998.10 and 26,293.60 is: 39,426.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,689.70 : 105,998.10 = 26,293.60 : x
  2. Step 2: Convert to fraction form
    70,689.70/105,998.10 = 26,293.60/x
  3. Step 3: Cross multiply
    70,689.70x = 105,998.10 × 26,293.60
  4. Step 4: Simplify right side
    70,689.70x = 2,787,071,642.16
  5. Step 5: Solve for x
    x = 2,787,071,642.16/70,689.70
  6. Step 6: Final answer
    x = 39,426.84

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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.