Home / 136,378.09-188,111.64-85,302.18

Finding the Fourth Proportional to 136,378.09, 188,111.64 and 85,302.18

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Solution

The fourth proportional to 136,378.09, 188,111.64 and 85,302.18 is: 117,660.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,378.09 : 188,111.64 = 85,302.18 : x
  2. Step 2: Convert to fraction form
    136,378.09/188,111.64 = 85,302.18/x
  3. Step 3: Cross multiply
    136,378.09x = 188,111.64 × 85,302.18
  4. Step 4: Simplify right side
    136,378.09x = 16,046,333,295.26
  5. Step 5: Solve for x
    x = 16,046,333,295.26/136,378.09
  6. Step 6: Final answer
    x = 117,660.64

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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.