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Finding the Fourth Proportional to 318,978.77, 478,561.70 and 94,345.11

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Solution

The fourth proportional to 318,978.77, 478,561.70 and 94,345.11 is: 141,545.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,978.77 : 478,561.70 = 94,345.11 : x
  2. Step 2: Convert to fraction form
    318,978.77/478,561.70 = 94,345.11/x
  3. Step 3: Cross multiply
    318,978.77x = 478,561.70 × 94,345.11
  4. Step 4: Simplify right side
    318,978.77x = 45,149,956,464.15
  5. Step 5: Solve for x
    x = 45,149,956,464.15/318,978.77
  6. Step 6: Final answer
    x = 141,545.34

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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.