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Finding the Fourth Proportional to 70,260.54, 105,390.99 and 28,707.54

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Solution

The fourth proportional to 70,260.54, 105,390.99 and 28,707.54 is: 43,061.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,260.54 : 105,390.99 = 28,707.54 : x
  2. Step 2: Convert to fraction form
    70,260.54/105,390.99 = 28,707.54/x
  3. Step 3: Cross multiply
    70,260.54x = 105,390.99 × 28,707.54
  4. Step 4: Simplify right side
    70,260.54x = 3,025,516,061.06
  5. Step 5: Solve for x
    x = 3,025,516,061.06/70,260.54
  6. Step 6: Final answer
    x = 43,061.38

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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.