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Finding the Fourth Proportional to 121,292.40, 181,938.60 and 47,420.40

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Solution

The fourth proportional to 121,292.40, 181,938.60 and 47,420.40 is: 71,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,292.40 : 181,938.60 = 47,420.40 : x
  2. Step 2: Convert to fraction form
    121,292.40/181,938.60 = 47,420.40/x
  3. Step 3: Cross multiply
    121,292.40x = 181,938.60 × 47,420.40
  4. Step 4: Simplify right side
    121,292.40x = 8,627,601,187.44
  5. Step 5: Solve for x
    x = 8,627,601,187.44/121,292.40
  6. Step 6: Final answer
    x = 71,130.60

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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.