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Finding the Fourth Proportional to 66,420.40, 99,519.65 and 46,663.58

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Solution

The fourth proportional to 66,420.40, 99,519.65 and 46,663.58 is: 69,917.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,420.40 : 99,519.65 = 46,663.58 : x
  2. Step 2: Convert to fraction form
    66,420.40/99,519.65 = 46,663.58/x
  3. Step 3: Cross multiply
    66,420.40x = 99,519.65 × 46,663.58
  4. Step 4: Simplify right side
    66,420.40x = 4,643,943,526.42
  5. Step 5: Solve for x
    x = 4,643,943,526.42/66,420.40
  6. Step 6: Final answer
    x = 69,917.43

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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.