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Finding the Fourth Proportional to 72,430,438.40, 108,645,657.60 and 55,424,326.40

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Solution

The fourth proportional to 72,430,438.40, 108,645,657.60 and 55,424,326.40 is: 83,136,489.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,430,438.40 : 108,645,657.60 = 55,424,326.40 : x
  2. Step 2: Convert to fraction form
    72,430,438.40/108,645,657.60 = 55,424,326.40/x
  3. Step 3: Cross multiply
    72,430,438.40x = 108,645,657.60 × 55,424,326.40
  4. Step 4: Simplify right side
    72,430,438.40x = 6,021,612,388,765,040
  5. Step 5: Solve for x
    x = 6,021,612,388,765,040/72,430,438.40
  6. Step 6: Final answer
    x = 83,136,489.60

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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.