Home / 81,090.77-111,897.32-55,618.89

Finding the Fourth Proportional to 81,090.77, 111,897.32 and 55,618.89

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Solution

The fourth proportional to 81,090.77, 111,897.32 and 55,618.89 is: 76,748.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,090.77 : 111,897.32 = 55,618.89 : x
  2. Step 2: Convert to fraction form
    81,090.77/111,897.32 = 55,618.89/x
  3. Step 3: Cross multiply
    81,090.77x = 111,897.32 × 55,618.89
  4. Step 4: Simplify right side
    81,090.77x = 6,223,604,454.28
  5. Step 5: Solve for x
    x = 6,223,604,454.28/81,090.77
  6. Step 6: Final answer
    x = 76,748.62

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1.5x scale

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.