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Finding the Fourth Proportional to 520,090.05, 780,135.08 and 146,064.45

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Solution

The fourth proportional to 520,090.05, 780,135.08 and 146,064.45 is: 219,096.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,090.05 : 780,135.08 = 146,064.45 : x
  2. Step 2: Convert to fraction form
    520,090.05/780,135.08 = 146,064.45/x
  3. Step 3: Cross multiply
    520,090.05x = 780,135.08 × 146,064.45
  4. Step 4: Simplify right side
    520,090.05x = 113,950,000,655.58
  5. Step 5: Solve for x
    x = 113,950,000,655.58/520,090.05
  6. Step 6: Final answer
    x = 219,096.68

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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.