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Finding the Fourth Proportional to 101,071,879.80, 151,607,819.70 and 90,301,342.20

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Solution

The fourth proportional to 101,071,879.80, 151,607,819.70 and 90,301,342.20 is: 135,452,013.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,071,879.80 : 151,607,819.70 = 90,301,342.20 : x
  2. Step 2: Convert to fraction form
    101,071,879.80/151,607,819.70 = 90,301,342.20/x
  3. Step 3: Cross multiply
    101,071,879.80x = 151,607,819.70 × 90,301,342.20
  4. Step 4: Simplify right side
    101,071,879.80x = 13,690,389,606,925,600
  5. Step 5: Solve for x
    x = 13,690,389,606,925,600/101,071,879.80
  6. Step 6: Final answer
    x = 135,452,013.30

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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.