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Finding the Fourth Proportional to 72,430,302.40, 108,645,453.60 and 55,424,190.40

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Solution

The fourth proportional to 72,430,302.40, 108,645,453.60 and 55,424,190.40 is: 83,136,285.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,430,302.40 : 108,645,453.60 = 55,424,190.40 : x
  2. Step 2: Convert to fraction form
    72,430,302.40/108,645,453.60 = 55,424,190.40/x
  3. Step 3: Cross multiply
    72,430,302.40x = 108,645,453.60 × 55,424,190.40
  4. Step 4: Simplify right side
    72,430,302.40x = 6,021,586,306,420,765
  5. Step 5: Solve for x
    x = 6,021,586,306,420,765/72,430,302.40
  6. Step 6: Final answer
    x = 83,136,285.60

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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.