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Finding the Fourth Proportional to 243,540.40, 365,368.20 and 77,328.40

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Solution

The fourth proportional to 243,540.40, 365,368.20 and 77,328.40 is: 116,010.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,540.40 : 365,368.20 = 77,328.40 : x
  2. Step 2: Convert to fraction form
    243,540.40/365,368.20 = 77,328.40/x
  3. Step 3: Cross multiply
    243,540.40x = 365,368.20 × 77,328.40
  4. Step 4: Simplify right side
    243,540.40x = 28,253,338,316.88
  5. Step 5: Solve for x
    x = 28,253,338,316.88/243,540.40
  6. Step 6: Final answer
    x = 116,010.89

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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.