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Finding the Fourth Proportional to 72,458.70, 108,688.05 and 69,834.30

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Solution

The fourth proportional to 72,458.70, 108,688.05 and 69,834.30 is: 104,751.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,458.70 : 108,688.05 = 69,834.30 : x
  2. Step 2: Convert to fraction form
    72,458.70/108,688.05 = 69,834.30/x
  3. Step 3: Cross multiply
    72,458.70x = 108,688.05 × 69,834.30
  4. Step 4: Simplify right side
    72,458.70x = 7,590,153,890.12
  5. Step 5: Solve for x
    x = 7,590,153,890.12/72,458.70
  6. Step 6: Final answer
    x = 104,751.45

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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.