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Finding the Fourth Proportional to 61,212,010.80, 91,605,439.80 and 42,080,134.80

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Solution

The fourth proportional to 61,212,010.80, 91,605,439.80 and 42,080,134.80 is: 62,974,066.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,212,010.80 : 91,605,439.80 = 42,080,134.80 : x
  2. Step 2: Convert to fraction form
    61,212,010.80/91,605,439.80 = 42,080,134.80/x
  3. Step 3: Cross multiply
    61,212,010.80x = 91,605,439.80 × 42,080,134.80
  4. Step 4: Simplify right side
    61,212,010.80x = 3,854,769,255,197,284.50
  5. Step 5: Solve for x
    x = 3,854,769,255,197,284.50/61,212,010.80
  6. Step 6: Final answer
    x = 62,974,066.77

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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.