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Finding the Fourth Proportional to 70,545.28, 105,816.74 and 28,424.34

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Solution

The fourth proportional to 70,545.28, 105,816.74 and 28,424.34 is: 42,636.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,545.28 : 105,816.74 = 28,424.34 : x
  2. Step 2: Convert to fraction form
    70,545.28/105,816.74 = 28,424.34/x
  3. Step 3: Cross multiply
    70,545.28x = 105,816.74 × 28,424.34
  4. Step 4: Simplify right side
    70,545.28x = 3,007,770,995.45
  5. Step 5: Solve for x
    x = 3,007,770,995.45/70,545.28
  6. Step 6: Final answer
    x = 42,636.03

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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.