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Finding the Fourth Proportional to 236,689.68, 355,037.64 and 78,918.18

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Solution

The fourth proportional to 236,689.68, 355,037.64 and 78,918.18 is: 118,378.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,689.68 : 355,037.64 = 78,918.18 : x
  2. Step 2: Convert to fraction form
    236,689.68/355,037.64 = 78,918.18/x
  3. Step 3: Cross multiply
    236,689.68x = 355,037.64 × 78,918.18
  4. Step 4: Simplify right side
    236,689.68x = 28,018,924,380.30
  5. Step 5: Solve for x
    x = 28,018,924,380.30/236,689.68
  6. Step 6: Final answer
    x = 118,378.31

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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.