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Finding the Fourth Proportional to 28,372,854.80, 42,569,779.80 and 9,204,237.20

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Solution

The fourth proportional to 28,372,854.80, 42,569,779.80 and 9,204,237.20 is: 13,809,761.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,372,854.80 : 42,569,779.80 = 9,204,237.20 : x
  2. Step 2: Convert to fraction form
    28,372,854.80/42,569,779.80 = 9,204,237.20/x
  3. Step 3: Cross multiply
    28,372,854.80x = 42,569,779.80 × 9,204,237.20
  4. Step 4: Simplify right side
    28,372,854.80x = 391,822,350,830,968.50
  5. Step 5: Solve for x
    x = 391,822,350,830,968.50/28,372,854.80
  6. Step 6: Final answer
    x = 13,809,761.25

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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.