Home / 142,440.18-196,564.08-78,776.64

Finding the Fourth Proportional to 142,440.18, 196,564.08 and 78,776.64

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Solution

The fourth proportional to 142,440.18, 196,564.08 and 78,776.64 is: 108,709.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,440.18 : 196,564.08 = 78,776.64 : x
  2. Step 2: Convert to fraction form
    142,440.18/196,564.08 = 78,776.64/x
  3. Step 3: Cross multiply
    142,440.18x = 196,564.08 × 78,776.64
  4. Step 4: Simplify right side
    142,440.18x = 15,484,657,767.09
  5. Step 5: Solve for x
    x = 15,484,657,767.09/142,440.18
  6. Step 6: Final answer
    x = 108,709.90

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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.