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Finding the Fourth Proportional to 249,978.40, 344,968.56 and 136,800.80

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Solution

The fourth proportional to 249,978.40, 344,968.56 and 136,800.80 is: 188,784.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,978.40 : 344,968.56 = 136,800.80 : x
  2. Step 2: Convert to fraction form
    249,978.40/344,968.56 = 136,800.80/x
  3. Step 3: Cross multiply
    249,978.40x = 344,968.56 × 136,800.80
  4. Step 4: Simplify right side
    249,978.40x = 47,191,974,982.85
  5. Step 5: Solve for x
    x = 47,191,974,982.85/249,978.40
  6. Step 6: Final answer
    x = 188,784.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.