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Finding the Fourth Proportional to 91,896,352.80, 137,844,529.20 and 40,783,538.40

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Solution

The fourth proportional to 91,896,352.80, 137,844,529.20 and 40,783,538.40 is: 61,175,307.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,896,352.80 : 137,844,529.20 = 40,783,538.40 : x
  2. Step 2: Convert to fraction form
    91,896,352.80/137,844,529.20 = 40,783,538.40/x
  3. Step 3: Cross multiply
    91,896,352.80x = 137,844,529.20 × 40,783,538.40
  4. Step 4: Simplify right side
    91,896,352.80x = 5,621,787,649,858,121
  5. Step 5: Solve for x
    x = 5,621,787,649,858,121/91,896,352.80
  6. Step 6: Final answer
    x = 61,175,307.60

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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.