Home / 76,121.76-105,046.56-42,130.25

Finding the Fourth Proportional to 76,121.76, 105,046.56 and 42,130.25

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Solution

The fourth proportional to 76,121.76, 105,046.56 and 42,130.25 is: 58,138.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,121.76 : 105,046.56 = 42,130.25 : x
  2. Step 2: Convert to fraction form
    76,121.76/105,046.56 = 42,130.25/x
  3. Step 3: Cross multiply
    76,121.76x = 105,046.56 × 42,130.25
  4. Step 4: Simplify right side
    76,121.76x = 4,425,637,309.21
  5. Step 5: Solve for x
    x = 4,425,637,309.21/76,121.76
  6. Step 6: Final answer
    x = 58,138.93

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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.