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Finding the Fourth Proportional to 243,693.40, 365,540.10 and 77,498.20

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Solution

The fourth proportional to 243,693.40, 365,540.10 and 77,498.20 is: 116,247.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,693.40 : 365,540.10 = 77,498.20 : x
  2. Step 2: Convert to fraction form
    243,693.40/365,540.10 = 77,498.20/x
  3. Step 3: Cross multiply
    243,693.40x = 365,540.10 × 77,498.20
  4. Step 4: Simplify right side
    243,693.40x = 28,328,699,777.82
  5. Step 5: Solve for x
    x = 28,328,699,777.82/243,693.40
  6. Step 6: Final answer
    x = 116,247.30

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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.