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Finding the Fourth Proportional to 56.32, 78.07 and 53.39

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Solution

The fourth proportional to 56.32, 78.07 and 53.39 is: 74.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.32 : 78.07 = 53.39 : x
  2. Step 2: Convert to fraction form
    56.32/78.07 = 53.39/x
  3. Step 3: Cross multiply
    56.32x = 78.07 × 53.39
  4. Step 4: Simplify right side
    56.32x = 4,168.10
  5. Step 5: Solve for x
    x = 4,168.10/56.32
  6. Step 6: Final answer
    x = 74.01

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.