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Finding the Fourth Proportional to 60,348.40, 90,530.70 and 20,917.60

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Solution

The fourth proportional to 60,348.40, 90,530.70 and 20,917.60 is: 31,379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,348.40 : 90,530.70 = 20,917.60 : x
  2. Step 2: Convert to fraction form
    60,348.40/90,530.70 = 20,917.60/x
  3. Step 3: Cross multiply
    60,348.40x = 90,530.70 × 20,917.60
  4. Step 4: Simplify right side
    60,348.40x = 1,893,684,970.32
  5. Step 5: Solve for x
    x = 1,893,684,970.32/60,348.40
  6. Step 6: Final answer
    x = 31,379.21

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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.