Home / 145,890.75-201,329.28-78,822.75

Finding the Fourth Proportional to 145,890.75, 201,329.28 and 78,822.75

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Solution

The fourth proportional to 145,890.75, 201,329.28 and 78,822.75 is: 108,775.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,890.75 : 201,329.28 = 78,822.75 : x
  2. Step 2: Convert to fraction form
    145,890.75/201,329.28 = 78,822.75/x
  3. Step 3: Cross multiply
    145,890.75x = 201,329.28 × 78,822.75
  4. Step 4: Simplify right side
    145,890.75x = 15,869,327,505.12
  5. Step 5: Solve for x
    x = 15,869,327,505.12/145,890.75
  6. Step 6: Final answer
    x = 108,775.42

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1.5x scale

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.