Home / 142,118.73-196,122.64-78,455.16

Finding the Fourth Proportional to 142,118.73, 196,122.64 and 78,455.16

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Solution

The fourth proportional to 142,118.73, 196,122.64 and 78,455.16 is: 108,267.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,118.73 : 196,122.64 = 78,455.16 : x
  2. Step 2: Convert to fraction form
    142,118.73/196,122.64 = 78,455.16/x
  3. Step 3: Cross multiply
    142,118.73x = 196,122.64 × 78,455.16
  4. Step 4: Simplify right side
    142,118.73x = 15,386,833,100.82
  5. Step 5: Solve for x
    x = 15,386,833,100.82/142,118.73
  6. Step 6: Final answer
    x = 108,267.45

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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.