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Finding the Fourth Proportional to 58.79, 87.71 and 53.56

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Solution

The fourth proportional to 58.79, 87.71 and 53.56 is: 79.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.79 : 87.71 = 53.56 : x
  2. Step 2: Convert to fraction form
    58.79/87.71 = 53.56/x
  3. Step 3: Cross multiply
    58.79x = 87.71 × 53.56
  4. Step 4: Simplify right side
    58.79x = 4,697.75
  5. Step 5: Solve for x
    x = 4,697.75/58.79
  6. Step 6: Final answer
    x = 79.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.