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Finding the Fourth Proportional to 243,386.20, 365,079.30 and 77,174.20

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Solution

The fourth proportional to 243,386.20, 365,079.30 and 77,174.20 is: 115,761.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,386.20 : 365,079.30 = 77,174.20 : x
  2. Step 2: Convert to fraction form
    243,386.20/365,079.30 = 77,174.20/x
  3. Step 3: Cross multiply
    243,386.20x = 365,079.30 × 77,174.20
  4. Step 4: Simplify right side
    243,386.20x = 28,174,702,914.06
  5. Step 5: Solve for x
    x = 28,174,702,914.06/243,386.20
  6. Step 6: Final answer
    x = 115,761.30

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1.5x scale

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.