Home / 90,723,172.05-136,084,758.08-81,369,810.45

Finding the Fourth Proportional to 90,723,172.05, 136,084,758.08 and 81,369,810.45

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Solution

The fourth proportional to 90,723,172.05, 136,084,758.08 and 81,369,810.45 is: 122,054,715.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,723,172.05 : 136,084,758.08 = 81,369,810.45 : x
  2. Step 2: Convert to fraction form
    90,723,172.05/136,084,758.08 = 81,369,810.45/x
  3. Step 3: Cross multiply
    90,723,172.05x = 136,084,758.08 × 81,369,810.45
  4. Step 4: Simplify right side
    90,723,172.05x = 11,073,190,969,696,856
  5. Step 5: Solve for x
    x = 11,073,190,969,696,856/90,723,172.05
  6. Step 6: Final answer
    x = 122,054,715.68

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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.