Home / 112,848.64-155,780.73-78,990.10

Finding the Fourth Proportional to 112,848.64, 155,780.73 and 78,990.10

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Solution

The fourth proportional to 112,848.64, 155,780.73 and 78,990.10 is: 109,041.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,848.64 : 155,780.73 = 78,990.10 : x
  2. Step 2: Convert to fraction form
    112,848.64/155,780.73 = 78,990.10/x
  3. Step 3: Cross multiply
    112,848.64x = 155,780.73 × 78,990.10
  4. Step 4: Simplify right side
    112,848.64x = 12,305,135,440.77
  5. Step 5: Solve for x
    x = 12,305,135,440.77/112,848.64
  6. Step 6: Final answer
    x = 109,041.06

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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.