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Finding the Fourth Proportional to 91,208.30, 136,860.51 and 64,725.32

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Solution

The fourth proportional to 91,208.30, 136,860.51 and 64,725.32 is: 97,122.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,208.30 : 136,860.51 = 64,725.32 : x
  2. Step 2: Convert to fraction form
    91,208.30/136,860.51 = 64,725.32/x
  3. Step 3: Cross multiply
    91,208.30x = 136,860.51 × 64,725.32
  4. Step 4: Simplify right side
    91,208.30x = 8,858,340,305.11
  5. Step 5: Solve for x
    x = 8,858,340,305.11/91,208.30
  6. Step 6: Final answer
    x = 97,122.09

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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.