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Finding the Fourth Proportional to 99,979,625.80, 149,969,438.70 and 28,176,041.80

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Solution

The fourth proportional to 99,979,625.80, 149,969,438.70 and 28,176,041.80 is: 42,264,062.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,979,625.80 : 149,969,438.70 = 28,176,041.80 : x
  2. Step 2: Convert to fraction form
    99,979,625.80/149,969,438.70 = 28,176,041.80/x
  3. Step 3: Cross multiply
    99,979,625.80x = 149,969,438.70 × 28,176,041.80
  4. Step 4: Simplify right side
    99,979,625.80x = 4,225,545,173,533,737.50
  5. Step 5: Solve for x
    x = 4,225,545,173,533,737.50/99,979,625.80
  6. Step 6: Final answer
    x = 42,264,062.70

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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.