Home / 77,712.16-107,242.60-43,720.66

Finding the Fourth Proportional to 77,712.16, 107,242.60 and 43,720.66

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Solution

The fourth proportional to 77,712.16, 107,242.60 and 43,720.66 is: 60,334.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,712.16 : 107,242.60 = 43,720.66 : x
  2. Step 2: Convert to fraction form
    77,712.16/107,242.60 = 43,720.66/x
  3. Step 3: Cross multiply
    77,712.16x = 107,242.60 × 43,720.66
  4. Step 4: Simplify right side
    77,712.16x = 4,688,717,252.12
  5. Step 5: Solve for x
    x = 4,688,717,252.12/77,712.16
  6. Step 6: Final answer
    x = 60,334.41

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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.