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Finding the Fourth Proportional to 28,672,291.60, 42,980,443.80 and 25,648,982.80

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Solution

The fourth proportional to 28,672,291.60, 42,980,443.80 and 25,648,982.80 is: 38,448,432.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,672,291.60 : 42,980,443.80 = 25,648,982.80 : x
  2. Step 2: Convert to fraction form
    28,672,291.60/42,980,443.80 = 25,648,982.80/x
  3. Step 3: Cross multiply
    28,672,291.60x = 42,980,443.80 × 25,648,982.80
  4. Step 4: Simplify right side
    28,672,291.60x = 1,102,404,663,762,566.62
  5. Step 5: Solve for x
    x = 1,102,404,663,762,566.62/28,672,291.60
  6. Step 6: Final answer
    x = 38,448,432.35

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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.