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Finding the Fourth Proportional to 121,840.40, 182,760.60 and 42,928.40

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Solution

The fourth proportional to 121,840.40, 182,760.60 and 42,928.40 is: 64,392.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,840.40 : 182,760.60 = 42,928.40 : x
  2. Step 2: Convert to fraction form
    121,840.40/182,760.60 = 42,928.40/x
  3. Step 3: Cross multiply
    121,840.40x = 182,760.60 × 42,928.40
  4. Step 4: Simplify right side
    121,840.40x = 7,845,620,141.04
  5. Step 5: Solve for x
    x = 7,845,620,141.04/121,840.40
  6. Step 6: Final answer
    x = 64,392.60

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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.