Home / 66,428,143.20-99,642,214.80-40,786,005.60

Finding the Fourth Proportional to 66,428,143.20, 99,642,214.80 and 40,786,005.60

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Solution

The fourth proportional to 66,428,143.20, 99,642,214.80 and 40,786,005.60 is: 61,179,008.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428,143.20 : 99,642,214.80 = 40,786,005.60 : x
  2. Step 2: Convert to fraction form
    66,428,143.20/99,642,214.80 = 40,786,005.60/x
  3. Step 3: Cross multiply
    66,428,143.20x = 99,642,214.80 × 40,786,005.60
  4. Step 4: Simplify right side
    66,428,143.20x = 4,064,007,930,829,203
  5. Step 5: Solve for x
    x = 4,064,007,930,829,203/66,428,143.20
  6. Step 6: Final answer
    x = 61,179,008.40

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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.