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Finding the Fourth Proportional to 91,911,145.80, 137,866,718.70 and 46,467,035.40

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Solution

The fourth proportional to 91,911,145.80, 137,866,718.70 and 46,467,035.40 is: 69,700,553.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,911,145.80 : 137,866,718.70 = 46,467,035.40 : x
  2. Step 2: Convert to fraction form
    91,911,145.80/137,866,718.70 = 46,467,035.40/x
  3. Step 3: Cross multiply
    91,911,145.80x = 137,866,718.70 × 46,467,035.40
  4. Step 4: Simplify right side
    91,911,145.80x = 6,406,257,698,314,741
  5. Step 5: Solve for x
    x = 6,406,257,698,314,741/91,911,145.80
  6. Step 6: Final answer
    x = 69,700,553.10

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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.