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Finding the Fourth Proportional to 228,621.48, 342,954.75 and 78,842.16

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Solution

The fourth proportional to 228,621.48, 342,954.75 and 78,842.16 is: 118,271.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,621.48 : 342,954.75 = 78,842.16 : x
  2. Step 2: Convert to fraction form
    228,621.48/342,954.75 = 78,842.16/x
  3. Step 3: Cross multiply
    228,621.48x = 342,954.75 × 78,842.16
  4. Step 4: Simplify right side
    228,621.48x = 27,039,293,272.26
  5. Step 5: Solve for x
    x = 27,039,293,272.26/228,621.48
  6. Step 6: Final answer
    x = 118,271.01

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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.