Home / 78,342.04-108,129.06-48,143.20

Finding the Fourth Proportional to 78,342.04, 108,129.06 and 48,143.20

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Solution

The fourth proportional to 78,342.04, 108,129.06 and 48,143.20 is: 66,448.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,342.04 : 108,129.06 = 48,143.20 : x
  2. Step 2: Convert to fraction form
    78,342.04/108,129.06 = 48,143.20/x
  3. Step 3: Cross multiply
    78,342.04x = 108,129.06 × 48,143.20
  4. Step 4: Simplify right side
    78,342.04x = 5,205,678,961.39
  5. Step 5: Solve for x
    x = 5,205,678,961.39/78,342.04
  6. Step 6: Final answer
    x = 66,448.09

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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.