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Finding the Fourth Proportional to 69,974.79, 105,005.93 and 28,421.79

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Solution

The fourth proportional to 69,974.79, 105,005.93 and 28,421.79 is: 42,650.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,974.79 : 105,005.93 = 28,421.79 : x
  2. Step 2: Convert to fraction form
    69,974.79/105,005.93 = 28,421.79/x
  3. Step 3: Cross multiply
    69,974.79x = 105,005.93 × 28,421.79
  4. Step 4: Simplify right side
    69,974.79x = 2,984,456,349.11
  5. Step 5: Solve for x
    x = 2,984,456,349.11/69,974.79
  6. Step 6: Final answer
    x = 42,650.45

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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.