Home / 145,935.20-201,390.60-78,867.20

Finding the Fourth Proportional to 145,935.20, 201,390.60 and 78,867.20

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Solution

The fourth proportional to 145,935.20, 201,390.60 and 78,867.20 is: 108,836.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,935.20 : 201,390.60 = 78,867.20 : x
  2. Step 2: Convert to fraction form
    145,935.20/201,390.60 = 78,867.20/x
  3. Step 3: Cross multiply
    145,935.20x = 201,390.60 × 78,867.20
  4. Step 4: Simplify right side
    145,935.20x = 15,883,112,728.32
  5. Step 5: Solve for x
    x = 15,883,112,728.32/145,935.20
  6. Step 6: Final answer
    x = 108,836.75

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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.