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Finding the Fourth Proportional to 72,281.52, 108,409.23 and 19,678.71

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Solution

The fourth proportional to 72,281.52, 108,409.23 and 19,678.71 is: 29,514.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,281.52 : 108,409.23 = 19,678.71 : x
  2. Step 2: Convert to fraction form
    72,281.52/108,409.23 = 19,678.71/x
  3. Step 3: Cross multiply
    72,281.52x = 108,409.23 × 19,678.71
  4. Step 4: Simplify right side
    72,281.52x = 2,133,353,798.49
  5. Step 5: Solve for x
    x = 2,133,353,798.49/72,281.52
  6. Step 6: Final answer
    x = 29,514.51

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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.