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Finding the Fourth Proportional to 70,399.97, 105,599.87 and 28,280.06

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Solution

The fourth proportional to 70,399.97, 105,599.87 and 28,280.06 is: 42,420.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,399.97 : 105,599.87 = 28,280.06 : x
  2. Step 2: Convert to fraction form
    70,399.97/105,599.87 = 28,280.06/x
  3. Step 3: Cross multiply
    70,399.97x = 105,599.87 × 28,280.06
  4. Step 4: Simplify right side
    70,399.97x = 2,986,369,990.19
  5. Step 5: Solve for x
    x = 2,986,369,990.19/70,399.97
  6. Step 6: Final answer
    x = 42,420.05

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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.