Home / 66,128,499.40-99,015,801.90-42,063,680.20

Finding the Fourth Proportional to 66,128,499.40, 99,015,801.90 and 42,063,680.20

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Solution

The fourth proportional to 66,128,499.40, 99,015,801.90 and 42,063,680.20 is: 62,982,965.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,128,499.40 : 99,015,801.90 = 42,063,680.20 : x
  2. Step 2: Convert to fraction form
    66,128,499.40/99,015,801.90 = 42,063,680.20/x
  3. Step 3: Cross multiply
    66,128,499.40x = 99,015,801.90 × 42,063,680.20
  4. Step 4: Simplify right side
    66,128,499.40x = 4,164,969,025,868,153
  5. Step 5: Solve for x
    x = 4,164,969,025,868,153/66,128,499.40
  6. Step 6: Final answer
    x = 62,982,965.95

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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.