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Finding the Fourth Proportional to 61.07, 91.06 and 59.40

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Solution

The fourth proportional to 61.07, 91.06 and 59.40 is: 88.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.07 : 91.06 = 59.40 : x
  2. Step 2: Convert to fraction form
    61.07/91.06 = 59.40/x
  3. Step 3: Cross multiply
    61.07x = 91.06 × 59.40
  4. Step 4: Simplify right side
    61.07x = 5,408.82
  5. Step 5: Solve for x
    x = 5,408.82/61.07
  6. Step 6: Final answer
    x = 88.57

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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.