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Finding the Fourth Proportional to 91,815,068.80, 137,424,004.80 and 71,510,377.60

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Solution

The fourth proportional to 91,815,068.80, 137,424,004.80 and 71,510,377.60 is: 107,033,002.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,815,068.80 : 137,424,004.80 = 71,510,377.60 : x
  2. Step 2: Convert to fraction form
    91,815,068.80/137,424,004.80 = 71,510,377.60/x
  3. Step 3: Cross multiply
    91,815,068.80x = 137,424,004.80 × 71,510,377.60
  4. Step 4: Simplify right side
    91,815,068.80x = 9,827,242,474,552,212
  5. Step 5: Solve for x
    x = 9,827,242,474,552,212/91,815,068.80
  6. Step 6: Final answer
    x = 107,033,002.35

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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.