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Finding the Fourth Proportional to 66,558,766.80, 99,987,449.40 and 64,020,680.40

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Solution

The fourth proportional to 66,558,766.80, 99,987,449.40 and 64,020,680.40 is: 96,174,626.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,558,766.80 : 99,987,449.40 = 64,020,680.40 : x
  2. Step 2: Convert to fraction form
    66,558,766.80/99,987,449.40 = 64,020,680.40/x
  3. Step 3: Cross multiply
    66,558,766.80x = 99,987,449.40 × 64,020,680.40
  4. Step 4: Simplify right side
    66,558,766.80x = 6,401,264,542,048,572
  5. Step 5: Solve for x
    x = 6,401,264,542,048,572/66,558,766.80
  6. Step 6: Final answer
    x = 96,174,626.57

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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.