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Finding the Fourth Proportional to 278,502,912.55, 417,754,368.83 and 74,030,987.80

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Solution

The fourth proportional to 278,502,912.55, 417,754,368.83 and 74,030,987.80 is: 111,046,481.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,502,912.55 : 417,754,368.83 = 74,030,987.80 : x
  2. Step 2: Convert to fraction form
    278,502,912.55/417,754,368.83 = 74,030,987.80/x
  3. Step 3: Cross multiply
    278,502,912.55x = 417,754,368.83 × 74,030,987.80
  4. Step 4: Simplify right side
    278,502,912.55x = 30,926,768,581,880,272
  5. Step 5: Solve for x
    x = 30,926,768,581,880,272/278,502,912.55
  6. Step 6: Final answer
    x = 111,046,481.70

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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.