Home / 142,047.20-196,034.72-81,637.60

Finding the Fourth Proportional to 142,047.20, 196,034.72 and 81,637.60

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Solution

The fourth proportional to 142,047.20, 196,034.72 and 81,637.60 is: 112,665.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,047.20 : 196,034.72 = 81,637.60 : x
  2. Step 2: Convert to fraction form
    142,047.20/196,034.72 = 81,637.60/x
  3. Step 3: Cross multiply
    142,047.20x = 196,034.72 × 81,637.60
  4. Step 4: Simplify right side
    142,047.20x = 16,003,804,057.47
  5. Step 5: Solve for x
    x = 16,003,804,057.47/142,047.20
  6. Step 6: Final answer
    x = 112,665.40

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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.