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Finding the Fourth Proportional to 318,825.96, 478,301.96 and 91,123.60

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Solution

The fourth proportional to 318,825.96, 478,301.96 and 91,123.60 is: 136,703.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,825.96 : 478,301.96 = 91,123.60 : x
  2. Step 2: Convert to fraction form
    318,825.96/478,301.96 = 91,123.60/x
  3. Step 3: Cross multiply
    318,825.96x = 478,301.96 × 91,123.60
  4. Step 4: Simplify right side
    318,825.96x = 43,584,596,482.26
  5. Step 5: Solve for x
    x = 43,584,596,482.26/318,825.96
  6. Step 6: Final answer
    x = 136,703.41

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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.