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Finding the Fourth Proportional to 144,457.40, 216,426.90 and 123,721.40

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Solution

The fourth proportional to 144,457.40, 216,426.90 and 123,721.40 is: 185,360.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,457.40 : 216,426.90 = 123,721.40 : x
  2. Step 2: Convert to fraction form
    144,457.40/216,426.90 = 123,721.40/x
  3. Step 3: Cross multiply
    144,457.40x = 216,426.90 × 123,721.40
  4. Step 4: Simplify right side
    144,457.40x = 26,776,639,065.66
  5. Step 5: Solve for x
    x = 26,776,639,065.66/144,457.40
  6. Step 6: Final answer
    x = 185,360.11

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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.