Home / 85,955.20-128,601.60-52,668.16

Finding the Fourth Proportional to 85,955.20, 128,601.60 and 52,668.16

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Solution

The fourth proportional to 85,955.20, 128,601.60 and 52,668.16 is: 78,799.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,955.20 : 128,601.60 = 52,668.16 : x
  2. Step 2: Convert to fraction form
    85,955.20/128,601.60 = 52,668.16/x
  3. Step 3: Cross multiply
    85,955.20x = 128,601.60 × 52,668.16
  4. Step 4: Simplify right side
    85,955.20x = 6,773,209,645.06
  5. Step 5: Solve for x
    x = 6,773,209,645.06/85,955.20
  6. Step 6: Final answer
    x = 78,799.30

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1.5x scale

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.