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Finding the Fourth Proportional to 90,991,272, 136,486,908 and 30,406,998

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Solution

The fourth proportional to 90,991,272, 136,486,908 and 30,406,998 is: 45,610,497

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,991,272 : 136,486,908 = 30,406,998 : x
  2. Step 2: Convert to fraction form
    90,991,272/136,486,908 = 30,406,998/x
  3. Step 3: Cross multiply
    90,991,272x = 136,486,908 × 30,406,998
  4. Step 4: Simplify right side
    90,991,272x = 4,150,157,138,582,184
  5. Step 5: Solve for x
    x = 4,150,157,138,582,184/90,991,272
  6. Step 6: Final answer
    x = 45,610,497

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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.