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Finding the Fourth Proportional to 40,803,900.40, 61,205,850.60 and 40,425,986.80

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Solution

The fourth proportional to 40,803,900.40, 61,205,850.60 and 40,425,986.80 is: 60,638,980.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,803,900.40 : 61,205,850.60 = 40,425,986.80 : x
  2. Step 2: Convert to fraction form
    40,803,900.40/61,205,850.60 = 40,425,986.80/x
  3. Step 3: Cross multiply
    40,803,900.40x = 61,205,850.60 × 40,425,986.80
  4. Step 4: Simplify right side
    40,803,900.40x = 2,474,306,908,438,372
  5. Step 5: Solve for x
    x = 2,474,306,908,438,372/40,803,900.40
  6. Step 6: Final answer
    x = 60,638,980.20

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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.