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Finding the Fourth Proportional to 115,803.90, 173,719.86 and 40,908.72

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Solution

The fourth proportional to 115,803.90, 173,719.86 and 40,908.72 is: 61,368.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,803.90 : 173,719.86 = 40,908.72 : x
  2. Step 2: Convert to fraction form
    115,803.90/173,719.86 = 40,908.72/x
  3. Step 3: Cross multiply
    115,803.90x = 173,719.86 × 40,908.72
  4. Step 4: Simplify right side
    115,803.90x = 7,106,657,111.18
  5. Step 5: Solve for x
    x = 7,106,657,111.18/115,803.90
  6. Step 6: Final answer
    x = 61,368.03

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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.