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Finding the Fourth Proportional to 61,340.88, 91,983.99 and 42,740.45

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Solution

The fourth proportional to 61,340.88, 91,983.99 and 42,740.45 is: 64,091.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,340.88 : 91,983.99 = 42,740.45 : x
  2. Step 2: Convert to fraction form
    61,340.88/91,983.99 = 42,740.45/x
  3. Step 3: Cross multiply
    61,340.88x = 91,983.99 × 42,740.45
  4. Step 4: Simplify right side
    61,340.88x = 3,931,437,125.40
  5. Step 5: Solve for x
    x = 3,931,437,125.40/61,340.88
  6. Step 6: Final answer
    x = 64,091.63

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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.