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Finding the Fourth Proportional to 118,090.68, 176,984.80 and 64,781.88

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Solution

The fourth proportional to 118,090.68, 176,984.80 and 64,781.88 is: 97,089.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,090.68 : 176,984.80 = 64,781.88 : x
  2. Step 2: Convert to fraction form
    118,090.68/176,984.80 = 64,781.88/x
  3. Step 3: Cross multiply
    118,090.68x = 176,984.80 × 64,781.88
  4. Step 4: Simplify right side
    118,090.68x = 11,465,408,075.42
  5. Step 5: Solve for x
    x = 11,465,408,075.42/118,090.68
  6. Step 6: Final answer
    x = 97,089.86

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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.