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Finding the Fourth Proportional to 70,007.10, 105,010.65 and 38,404.95

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Solution

The fourth proportional to 70,007.10, 105,010.65 and 38,404.95 is: 57,607.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,007.10 : 105,010.65 = 38,404.95 : x
  2. Step 2: Convert to fraction form
    70,007.10/105,010.65 = 38,404.95/x
  3. Step 3: Cross multiply
    70,007.10x = 105,010.65 × 38,404.95
  4. Step 4: Simplify right side
    70,007.10x = 4,032,928,762.72
  5. Step 5: Solve for x
    x = 4,032,928,762.72/70,007.10
  6. Step 6: Final answer
    x = 57,607.43

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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.