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Finding the Fourth Proportional to 259,312.18, 388,746.41 and 99,502.79

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Solution

The fourth proportional to 259,312.18, 388,746.41 and 99,502.79 is: 149,169.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,312.18 : 388,746.41 = 99,502.79 : x
  2. Step 2: Convert to fraction form
    259,312.18/388,746.41 = 99,502.79/x
  3. Step 3: Cross multiply
    259,312.18x = 388,746.41 × 99,502.79
  4. Step 4: Simplify right side
    259,312.18x = 38,681,353,787.30
  5. Step 5: Solve for x
    x = 38,681,353,787.30/259,312.18
  6. Step 6: Final answer
    x = 149,169.06

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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.