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Finding the Fourth Proportional to 243,543.40, 365,372.70 and 77,331.40

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Solution

The fourth proportional to 243,543.40, 365,372.70 and 77,331.40 is: 116,015.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,543.40 : 365,372.70 = 77,331.40 : x
  2. Step 2: Convert to fraction form
    243,543.40/365,372.70 = 77,331.40/x
  3. Step 3: Cross multiply
    243,543.40x = 365,372.70 × 77,331.40
  4. Step 4: Simplify right side
    243,543.40x = 28,254,782,412.78
  5. Step 5: Solve for x
    x = 28,254,782,412.78/243,543.40
  6. Step 6: Final answer
    x = 116,015.39

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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.