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Finding the Fourth Proportional to 364,643.79, 547,210.31 and 127,987.17

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Solution

The fourth proportional to 364,643.79, 547,210.31 and 127,987.17 is: 192,066.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    364,643.79 : 547,210.31 = 127,987.17 : x
  2. Step 2: Convert to fraction form
    364,643.79/547,210.31 = 127,987.17/x
  3. Step 3: Cross multiply
    364,643.79x = 547,210.31 × 127,987.17
  4. Step 4: Simplify right side
    364,643.79x = 70,035,898,331.79
  5. Step 5: Solve for x
    x = 70,035,898,331.79/364,643.79
  6. Step 6: Final answer
    x = 192,066.61

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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.