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Finding the Fourth Proportional to 60,660,986.40, 90,991,479.60 and 45,544,442.40

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Solution

The fourth proportional to 60,660,986.40, 90,991,479.60 and 45,544,442.40 is: 68,316,663.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,660,986.40 : 90,991,479.60 = 45,544,442.40 : x
  2. Step 2: Convert to fraction form
    60,660,986.40/90,991,479.60 = 45,544,442.40/x
  3. Step 3: Cross multiply
    60,660,986.40x = 90,991,479.60 × 45,544,442.40
  4. Step 4: Simplify right side
    60,660,986.40x = 4,144,156,201,532,974.50
  5. Step 5: Solve for x
    x = 4,144,156,201,532,974.50/60,660,986.40
  6. Step 6: Final answer
    x = 68,316,663.60

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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.