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Finding the Fourth Proportional to 70,328.69, 105,420.13 and 43,972.91

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Solution

The fourth proportional to 70,328.69, 105,420.13 and 43,972.91 is: 65,913.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,328.69 : 105,420.13 = 43,972.91 : x
  2. Step 2: Convert to fraction form
    70,328.69/105,420.13 = 43,972.91/x
  3. Step 3: Cross multiply
    70,328.69x = 105,420.13 × 43,972.91
  4. Step 4: Simplify right side
    70,328.69x = 4,635,629,141.71
  5. Step 5: Solve for x
    x = 4,635,629,141.71/70,328.69
  6. Step 6: Final answer
    x = 65,913.78

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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.