Home / 142,123.92-196,137.36-81,714.16

Finding the Fourth Proportional to 142,123.92, 196,137.36 and 81,714.16

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Solution

The fourth proportional to 142,123.92, 196,137.36 and 81,714.16 is: 112,769.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,123.92 : 196,137.36 = 81,714.16 : x
  2. Step 2: Convert to fraction form
    142,123.92/196,137.36 = 81,714.16/x
  3. Step 3: Cross multiply
    142,123.92x = 196,137.36 × 81,714.16
  4. Step 4: Simplify right side
    142,123.92x = 16,027,199,617.02
  5. Step 5: Solve for x
    x = 16,027,199,617.02/142,123.92
  6. Step 6: Final answer
    x = 112,769.19

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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.