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Finding the Fourth Proportional to 123,617.40, 185,426.10 and 121,430.40

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Solution

The fourth proportional to 123,617.40, 185,426.10 and 121,430.40 is: 182,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,617.40 : 185,426.10 = 121,430.40 : x
  2. Step 2: Convert to fraction form
    123,617.40/185,426.10 = 121,430.40/x
  3. Step 3: Cross multiply
    123,617.40x = 185,426.10 × 121,430.40
  4. Step 4: Simplify right side
    123,617.40x = 22,516,365,493.44
  5. Step 5: Solve for x
    x = 22,516,365,493.44/123,617.40
  6. Step 6: Final answer
    x = 182,145.60

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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.