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Finding the Fourth Proportional to 72,326.72, 99,760.64 and 61,544

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Solution

The fourth proportional to 72,326.72, 99,760.64 and 61,544 is: 84,887.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,326.72 : 99,760.64 = 61,544 : x
  2. Step 2: Convert to fraction form
    72,326.72/99,760.64 = 61,544/x
  3. Step 3: Cross multiply
    72,326.72x = 99,760.64 × 61,544
  4. Step 4: Simplify right side
    72,326.72x = 6,139,668,828.16
  5. Step 5: Solve for x
    x = 6,139,668,828.16/72,326.72
  6. Step 6: Final answer
    x = 84,887.98

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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.