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Finding the Fourth Proportional to 115,168.40, 172,802.76 and 40,342.32

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Solution

The fourth proportional to 115,168.40, 172,802.76 and 40,342.32 is: 60,531.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,168.40 : 172,802.76 = 40,342.32 : x
  2. Step 2: Convert to fraction form
    115,168.40/172,802.76 = 40,342.32/x
  3. Step 3: Cross multiply
    115,168.40x = 172,802.76 × 40,342.32
  4. Step 4: Simplify right side
    115,168.40x = 6,971,264,240.80
  5. Step 5: Solve for x
    x = 6,971,264,240.80/115,168.40
  6. Step 6: Final answer
    x = 60,531.05

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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.