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Finding the Fourth Proportional to 71,980.63, 99,332.61 and 39,715.54

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Solution

The fourth proportional to 71,980.63, 99,332.61 and 39,715.54 is: 54,807.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,980.63 : 99,332.61 = 39,715.54 : x
  2. Step 2: Convert to fraction form
    71,980.63/99,332.61 = 39,715.54/x
  3. Step 3: Cross multiply
    71,980.63x = 99,332.61 × 39,715.54
  4. Step 4: Simplify right side
    71,980.63x = 3,945,048,407.24
  5. Step 5: Solve for x
    x = 3,945,048,407.24/71,980.63
  6. Step 6: Final answer
    x = 54,807.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.