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Finding the Fourth Proportional to 99,979,603.30, 149,969,404.95 and 28,176,019.30

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Solution

The fourth proportional to 99,979,603.30, 149,969,404.95 and 28,176,019.30 is: 42,264,028.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,979,603.30 : 149,969,404.95 = 28,176,019.30 : x
  2. Step 2: Convert to fraction form
    99,979,603.30/149,969,404.95 = 28,176,019.30/x
  3. Step 3: Cross multiply
    99,979,603.30x = 149,969,404.95 × 28,176,019.30
  4. Step 4: Simplify right side
    99,979,603.30x = 4,225,540,848,280,715.50
  5. Step 5: Solve for x
    x = 4,225,540,848,280,715.50/99,979,603.30
  6. Step 6: Final answer
    x = 42,264,028.95

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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.