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Finding the Fourth Proportional to 77,775.67, 116,663.58 and 21,615.79

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Solution

The fourth proportional to 77,775.67, 116,663.58 and 21,615.79 is: 32,423.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,775.67 : 116,663.58 = 21,615.79 : x
  2. Step 2: Convert to fraction form
    77,775.67/116,663.58 = 21,615.79/x
  3. Step 3: Cross multiply
    77,775.67x = 116,663.58 × 21,615.79
  4. Step 4: Simplify right side
    77,775.67x = 2,521,775,445.93
  5. Step 5: Solve for x
    x = 2,521,775,445.93/77,775.67
  6. Step 6: Final answer
    x = 32,423.71

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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.