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Finding the Fourth Proportional to 112,471, 155,029.40 and 76,160.94

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Solution

The fourth proportional to 112,471, 155,029.40 and 76,160.94 is: 104,979.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,471 : 155,029.40 = 76,160.94 : x
  2. Step 2: Convert to fraction form
    112,471/155,029.40 = 76,160.94/x
  3. Step 3: Cross multiply
    112,471x = 155,029.40 × 76,160.94
  4. Step 4: Simplify right side
    112,471x = 11,807,184,831.64
  5. Step 5: Solve for x
    x = 11,807,184,831.64/112,471
  6. Step 6: Final answer
    x = 104,979.82

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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.