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Finding the Fourth Proportional to 66,475,432.40, 99,722,479.80 and 21,032,488.40

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Solution

The fourth proportional to 66,475,432.40, 99,722,479.80 and 21,032,488.40 is: 31,551,684.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,475,432.40 : 99,722,479.80 = 21,032,488.40 : x
  2. Step 2: Convert to fraction form
    66,475,432.40/99,722,479.80 = 21,032,488.40/x
  3. Step 3: Cross multiply
    66,475,432.40x = 99,722,479.80 × 21,032,488.40
  4. Step 4: Simplify right side
    66,475,432.40x = 2,097,411,899,612,734
  5. Step 5: Solve for x
    x = 2,097,411,899,612,734/66,475,432.40
  6. Step 6: Final answer
    x = 31,551,684.94

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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.