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Finding the Fourth Proportional to 72,355.60, 108,699.80 and 51,057.36

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Solution

The fourth proportional to 72,355.60, 108,699.80 and 51,057.36 is: 76,703.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,355.60 : 108,699.80 = 51,057.36 : x
  2. Step 2: Convert to fraction form
    72,355.60/108,699.80 = 51,057.36/x
  3. Step 3: Cross multiply
    72,355.60x = 108,699.80 × 51,057.36
  4. Step 4: Simplify right side
    72,355.60x = 5,549,924,820.53
  5. Step 5: Solve for x
    x = 5,549,924,820.53/72,355.60
  6. Step 6: Final answer
    x = 76,703.46

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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.