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Finding the Fourth Proportional to 180,551.28, 249,160.60 and 99,978.80

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Solution

The fourth proportional to 180,551.28, 249,160.60 and 99,978.80 is: 137,970.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,551.28 : 249,160.60 = 99,978.80 : x
  2. Step 2: Convert to fraction form
    180,551.28/249,160.60 = 99,978.80/x
  3. Step 3: Cross multiply
    180,551.28x = 249,160.60 × 99,978.80
  4. Step 4: Simplify right side
    180,551.28x = 24,910,777,795.28
  5. Step 5: Solve for x
    x = 24,910,777,795.28/180,551.28
  6. Step 6: Final answer
    x = 137,970.65

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1.5x scale

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.