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Finding the Fourth Proportional to 66,308,787.20, 99,476,632.80 and 20,860,011.20

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Solution

The fourth proportional to 66,308,787.20, 99,476,632.80 and 20,860,011.20 is: 31,294,248.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,308,787.20 : 99,476,632.80 = 20,860,011.20 : x
  2. Step 2: Convert to fraction form
    66,308,787.20/99,476,632.80 = 20,860,011.20/x
  3. Step 3: Cross multiply
    66,308,787.20x = 99,476,632.80 × 20,860,011.20
  4. Step 4: Simplify right side
    66,308,787.20x = 2,075,083,674,346,287.25
  5. Step 5: Solve for x
    x = 2,075,083,674,346,287.25/66,308,787.20
  6. Step 6: Final answer
    x = 31,294,248.65

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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.