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Finding the Fourth Proportional to 157,536.40, 236,458.20 and 78,739.60

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Solution

The fourth proportional to 157,536.40, 236,458.20 and 78,739.60 is: 118,186.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,536.40 : 236,458.20 = 78,739.60 : x
  2. Step 2: Convert to fraction form
    157,536.40/236,458.20 = 78,739.60/x
  3. Step 3: Cross multiply
    157,536.40x = 236,458.20 × 78,739.60
  4. Step 4: Simplify right side
    157,536.40x = 18,618,624,084.72
  5. Step 5: Solve for x
    x = 18,618,624,084.72/157,536.40
  6. Step 6: Final answer
    x = 118,186.17

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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.