Home / 145,209.56-200,389.49-81,547.61

Finding the Fourth Proportional to 145,209.56, 200,389.49 and 81,547.61

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Solution

The fourth proportional to 145,209.56, 200,389.49 and 81,547.61 is: 112,535.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,209.56 : 200,389.49 = 81,547.61 : x
  2. Step 2: Convert to fraction form
    145,209.56/200,389.49 = 81,547.61/x
  3. Step 3: Cross multiply
    145,209.56x = 200,389.49 × 81,547.61
  4. Step 4: Simplify right side
    145,209.56x = 16,341,282,568.93
  5. Step 5: Solve for x
    x = 16,341,282,568.93/145,209.56
  6. Step 6: Final answer
    x = 112,535.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.