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Finding the Fourth Proportional to 212,543.79, 318,465.76 and 148,508.43

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Solution

The fourth proportional to 212,543.79, 318,465.76 and 148,508.43 is: 222,518.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,543.79 : 318,465.76 = 148,508.43 : x
  2. Step 2: Convert to fraction form
    212,543.79/318,465.76 = 148,508.43/x
  3. Step 3: Cross multiply
    212,543.79x = 318,465.76 × 148,508.43
  4. Step 4: Simplify right side
    212,543.79x = 47,294,850,026.36
  5. Step 5: Solve for x
    x = 47,294,850,026.36/212,543.79
  6. Step 6: Final answer
    x = 222,518.15

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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.