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Finding the Fourth Proportional to 66,563.94, 99,911.51 and 40,319.94

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Solution

The fourth proportional to 66,563.94, 99,911.51 and 40,319.94 is: 60,519.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,563.94 : 99,911.51 = 40,319.94 : x
  2. Step 2: Convert to fraction form
    66,563.94/99,911.51 = 40,319.94/x
  3. Step 3: Cross multiply
    66,563.94x = 99,911.51 × 40,319.94
  4. Step 4: Simplify right side
    66,563.94x = 4,028,426,088.51
  5. Step 5: Solve for x
    x = 4,028,426,088.51/66,563.94
  6. Step 6: Final answer
    x = 60,519.65

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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.