Home / 145,972.20-201,441.54-78,904.20

Finding the Fourth Proportional to 145,972.20, 201,441.54 and 78,904.20

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Solution

The fourth proportional to 145,972.20, 201,441.54 and 78,904.20 is: 108,887.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,972.20 : 201,441.54 = 78,904.20 : x
  2. Step 2: Convert to fraction form
    145,972.20/201,441.54 = 78,904.20/x
  3. Step 3: Cross multiply
    145,972.20x = 201,441.54 × 78,904.20
  4. Step 4: Simplify right side
    145,972.20x = 15,894,583,560.47
  5. Step 5: Solve for x
    x = 15,894,583,560.47/145,972.20
  6. Step 6: Final answer
    x = 108,887.74

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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.