Home / 78,887.09-108,899.36-61,384.81

Finding the Fourth Proportional to 78,887.09, 108,899.36 and 61,384.81

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Solution

The fourth proportional to 78,887.09, 108,899.36 and 61,384.81 is: 84,738.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,887.09 : 108,899.36 = 61,384.81 : x
  2. Step 2: Convert to fraction form
    78,887.09/108,899.36 = 61,384.81/x
  3. Step 3: Cross multiply
    78,887.09x = 108,899.36 × 61,384.81
  4. Step 4: Simplify right side
    78,887.09x = 6,684,766,522.72
  5. Step 5: Solve for x
    x = 6,684,766,522.72/78,887.09
  6. Step 6: Final answer
    x = 84,738.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.