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Finding the Fourth Proportional to 66,490.80, 99,851.40 and 46,906.80

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Solution

The fourth proportional to 66,490.80, 99,851.40 and 46,906.80 is: 70,441.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,490.80 : 99,851.40 = 46,906.80 : x
  2. Step 2: Convert to fraction form
    66,490.80/99,851.40 = 46,906.80/x
  3. Step 3: Cross multiply
    66,490.80x = 99,851.40 × 46,906.80
  4. Step 4: Simplify right side
    66,490.80x = 4,683,709,649.52
  5. Step 5: Solve for x
    x = 4,683,709,649.52/66,490.80
  6. Step 6: Final answer
    x = 70,441.47

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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.