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Finding the Fourth Proportional to 91,815,070.80, 137,424,007.80 and 71,510,379.60

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Solution

The fourth proportional to 91,815,070.80, 137,424,007.80 and 71,510,379.60 is: 107,033,005.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,815,070.80 : 137,424,007.80 = 71,510,379.60 : x
  2. Step 2: Convert to fraction form
    91,815,070.80/137,424,007.80 = 71,510,379.60/x
  3. Step 3: Cross multiply
    91,815,070.80x = 137,424,007.80 × 71,510,379.60
  4. Step 4: Simplify right side
    91,815,070.80x = 9,827,242,963,931,360
  5. Step 5: Solve for x
    x = 9,827,242,963,931,360/91,815,070.80
  6. Step 6: Final answer
    x = 107,033,005.35

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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.