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Finding the Fourth Proportional to 243,690.40, 365,535.60 and 77,495.20

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Solution

The fourth proportional to 243,690.40, 365,535.60 and 77,495.20 is: 116,242.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,690.40 : 365,535.60 = 77,495.20 : x
  2. Step 2: Convert to fraction form
    243,690.40/365,535.60 = 77,495.20/x
  3. Step 3: Cross multiply
    243,690.40x = 365,535.60 × 77,495.20
  4. Step 4: Simplify right side
    243,690.40x = 28,327,254,429.12
  5. Step 5: Solve for x
    x = 28,327,254,429.12/243,690.40
  6. Step 6: Final answer
    x = 116,242.80

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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.