Home / 72,170,079.70-108,015,971.10-66,430,516.90

Finding the Fourth Proportional to 72,170,079.70, 108,015,971.10 and 66,430,516.90

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Solution

The fourth proportional to 72,170,079.70, 108,015,971.10 and 66,430,516.90 is: 99,425,645.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,170,079.70 : 108,015,971.10 = 66,430,516.90 : x
  2. Step 2: Convert to fraction form
    72,170,079.70/108,015,971.10 = 66,430,516.90/x
  3. Step 3: Cross multiply
    72,170,079.70x = 108,015,971.10 × 66,430,516.90
  4. Step 4: Simplify right side
    72,170,079.70x = 7,175,556,793,628,461
  5. Step 5: Solve for x
    x = 7,175,556,793,628,461/72,170,079.70
  6. Step 6: Final answer
    x = 99,425,645.97

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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.