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Finding the Fourth Proportional to 257,617.60, 386,426.40 and 124,561.60

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Solution

The fourth proportional to 257,617.60, 386,426.40 and 124,561.60 is: 186,842.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,617.60 : 386,426.40 = 124,561.60 : x
  2. Step 2: Convert to fraction form
    257,617.60/386,426.40 = 124,561.60/x
  3. Step 3: Cross multiply
    257,617.60x = 386,426.40 × 124,561.60
  4. Step 4: Simplify right side
    257,617.60x = 48,133,890,666.24
  5. Step 5: Solve for x
    x = 48,133,890,666.24/257,617.60
  6. Step 6: Final answer
    x = 186,842.40

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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.