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Finding the Fourth Proportional to 61,176.78, 91,645.74 and 42,156.63

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Solution

The fourth proportional to 61,176.78, 91,645.74 and 42,156.63 is: 63,152.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,176.78 : 91,645.74 = 42,156.63 : x
  2. Step 2: Convert to fraction form
    61,176.78/91,645.74 = 42,156.63/x
  3. Step 3: Cross multiply
    61,176.78x = 91,645.74 × 42,156.63
  4. Step 4: Simplify right side
    61,176.78x = 3,863,475,552.26
  5. Step 5: Solve for x
    x = 3,863,475,552.26/61,176.78
  6. Step 6: Final answer
    x = 63,152.65

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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.