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Finding the Fourth Proportional to 145,055.99, 217,628.52 and 69,251.25

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Solution

The fourth proportional to 145,055.99, 217,628.52 and 69,251.25 is: 103,898.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,055.99 : 217,628.52 = 69,251.25 : x
  2. Step 2: Convert to fraction form
    145,055.99/217,628.52 = 69,251.25/x
  3. Step 3: Cross multiply
    145,055.99x = 217,628.52 × 69,251.25
  4. Step 4: Simplify right side
    145,055.99x = 15,071,047,991.60
  5. Step 5: Solve for x
    x = 15,071,047,991.60/145,055.99
  6. Step 6: Final answer
    x = 103,898.14

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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.