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Finding the Fourth Proportional to 61,280.54, 91,920.88 and 19,160.84

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Solution

The fourth proportional to 61,280.54, 91,920.88 and 19,160.84 is: 28,741.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,280.54 : 91,920.88 = 19,160.84 : x
  2. Step 2: Convert to fraction form
    61,280.54/91,920.88 = 19,160.84/x
  3. Step 3: Cross multiply
    61,280.54x = 91,920.88 × 19,160.84
  4. Step 4: Simplify right side
    61,280.54x = 1,761,281,274.34
  5. Step 5: Solve for x
    x = 1,761,281,274.34/61,280.54
  6. Step 6: Final answer
    x = 28,741.28

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1.5x scale

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.