Home / 142,857.10-197,145.48-78,322.06

Finding the Fourth Proportional to 142,857.10, 197,145.48 and 78,322.06

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Solution

The fourth proportional to 142,857.10, 197,145.48 and 78,322.06 is: 108,085.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,857.10 : 197,145.48 = 78,322.06 : x
  2. Step 2: Convert to fraction form
    142,857.10/197,145.48 = 78,322.06/x
  3. Step 3: Cross multiply
    142,857.10x = 197,145.48 × 78,322.06
  4. Step 4: Simplify right side
    142,857.10x = 15,440,840,113.29
  5. Step 5: Solve for x
    x = 15,440,840,113.29/142,857.10
  6. Step 6: Final answer
    x = 108,085.91

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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.