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Finding the Fourth Proportional to 28,748,809.60, 43,123,214.40 and 20,644,662.40

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Solution

The fourth proportional to 28,748,809.60, 43,123,214.40 and 20,644,662.40 is: 30,966,993.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,748,809.60 : 43,123,214.40 = 20,644,662.40 : x
  2. Step 2: Convert to fraction form
    28,748,809.60/43,123,214.40 = 20,644,662.40/x
  3. Step 3: Cross multiply
    28,748,809.60x = 43,123,214.40 × 20,644,662.40
  4. Step 4: Simplify right side
    28,748,809.60x = 890,264,202,890,818.50
  5. Step 5: Solve for x
    x = 890,264,202,890,818.50/28,748,809.60
  6. Step 6: Final answer
    x = 30,966,993.60

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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.