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Finding the Fourth Proportional to 66,996,980.60, 100,495,470.90 and 28,662,369.80

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Solution

The fourth proportional to 66,996,980.60, 100,495,470.90 and 28,662,369.80 is: 42,993,554.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,996,980.60 : 100,495,470.90 = 28,662,369.80 : x
  2. Step 2: Convert to fraction form
    66,996,980.60/100,495,470.90 = 28,662,369.80/x
  3. Step 3: Cross multiply
    66,996,980.60x = 100,495,470.90 × 28,662,369.80
  4. Step 4: Simplify right side
    66,996,980.60x = 2,880,438,350,160,939
  5. Step 5: Solve for x
    x = 2,880,438,350,160,939/66,996,980.60
  6. Step 6: Final answer
    x = 42,993,554.70

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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.