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Finding the Fourth Proportional to 249,708.40, 374,611.20 and 72,221.20

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Solution

The fourth proportional to 249,708.40, 374,611.20 and 72,221.20 is: 108,345.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,708.40 : 374,611.20 = 72,221.20 : x
  2. Step 2: Convert to fraction form
    249,708.40/374,611.20 = 72,221.20/x
  3. Step 3: Cross multiply
    249,708.40x = 374,611.20 × 72,221.20
  4. Step 4: Simplify right side
    249,708.40x = 27,054,870,397.44
  5. Step 5: Solve for x
    x = 27,054,870,397.44/249,708.40
  6. Step 6: Final answer
    x = 108,345.86

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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.