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Finding the Fourth Proportional to 249,930.40, 374,944.20 and 72,443.20

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Solution

The fourth proportional to 249,930.40, 374,944.20 and 72,443.20 is: 108,678.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,930.40 : 374,944.20 = 72,443.20 : x
  2. Step 2: Convert to fraction form
    249,930.40/374,944.20 = 72,443.20/x
  3. Step 3: Cross multiply
    249,930.40x = 374,944.20 × 72,443.20
  4. Step 4: Simplify right side
    249,930.40x = 27,162,157,669.44
  5. Step 5: Solve for x
    x = 27,162,157,669.44/249,930.40
  6. Step 6: Final answer
    x = 108,678.89

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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.