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Finding the Fourth Proportional to 90,991,280, 136,486,920 and 30,407,006

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Solution

The fourth proportional to 90,991,280, 136,486,920 and 30,407,006 is: 45,610,509

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,991,280 : 136,486,920 = 30,407,006 : x
  2. Step 2: Convert to fraction form
    90,991,280/136,486,920 = 30,407,006/x
  3. Step 3: Cross multiply
    90,991,280x = 136,486,920 × 30,407,006
  4. Step 4: Simplify right side
    90,991,280x = 4,150,158,595,361,520
  5. Step 5: Solve for x
    x = 4,150,158,595,361,520/90,991,280
  6. Step 6: Final answer
    x = 45,610,509

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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.