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Finding the Fourth Proportional to 66,309,500.20, 99,477,702.30 and 20,860,724.20

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Solution

The fourth proportional to 66,309,500.20, 99,477,702.30 and 20,860,724.20 is: 31,295,318.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,309,500.20 : 99,477,702.30 = 20,860,724.20 : x
  2. Step 2: Convert to fraction form
    66,309,500.20/99,477,702.30 = 20,860,724.20/x
  3. Step 3: Cross multiply
    66,309,500.20x = 99,477,702.30 × 20,860,724.20
  4. Step 4: Simplify right side
    66,309,500.20x = 2,075,176,911,730,005.50
  5. Step 5: Solve for x
    x = 2,075,176,911,730,005.50/66,309,500.20
  6. Step 6: Final answer
    x = 31,295,318.25

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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.