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Finding the Fourth Proportional to 138,672,602.80, 208,008,904.20 and 98,361,818.80

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Solution

The fourth proportional to 138,672,602.80, 208,008,904.20 and 98,361,818.80 is: 147,542,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,672,602.80 : 208,008,904.20 = 98,361,818.80 : x
  2. Step 2: Convert to fraction form
    138,672,602.80/208,008,904.20 = 98,361,818.80/x
  3. Step 3: Cross multiply
    138,672,602.80x = 208,008,904.20 × 98,361,818.80
  4. Step 4: Simplify right side
    138,672,602.80x = 20,460,134,143,706,956
  5. Step 5: Solve for x
    x = 20,460,134,143,706,956/138,672,602.80
  6. Step 6: Final answer
    x = 147,542,728.20

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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.