Home / 130,643.81-180,326.82-85,328.72

Finding the Fourth Proportional to 130,643.81, 180,326.82 and 85,328.72

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Solution

The fourth proportional to 130,643.81, 180,326.82 and 85,328.72 is: 117,778.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,643.81 : 180,326.82 = 85,328.72 : x
  2. Step 2: Convert to fraction form
    130,643.81/180,326.82 = 85,328.72/x
  3. Step 3: Cross multiply
    130,643.81x = 180,326.82 × 85,328.72
  4. Step 4: Simplify right side
    130,643.81x = 15,387,055,403.99
  5. Step 5: Solve for x
    x = 15,387,055,403.99/130,643.81
  6. Step 6: Final answer
    x = 117,778.68

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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.