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Finding the Fourth Proportional to 129,684.81, 179,009.70 and 75,987.21

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Solution

The fourth proportional to 129,684.81, 179,009.70 and 75,987.21 is: 104,888.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,684.81 : 179,009.70 = 75,987.21 : x
  2. Step 2: Convert to fraction form
    129,684.81/179,009.70 = 75,987.21/x
  3. Step 3: Cross multiply
    129,684.81x = 179,009.70 × 75,987.21
  4. Step 4: Simplify right side
    129,684.81x = 13,602,447,665.94
  5. Step 5: Solve for x
    x = 13,602,447,665.94/129,684.81
  6. Step 6: Final answer
    x = 104,888.52

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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.