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Finding the Fourth Proportional to 136,888.52, 188,904.12 and 76,460.18

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Solution

The fourth proportional to 136,888.52, 188,904.12 and 76,460.18 is: 105,513.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,888.52 : 188,904.12 = 76,460.18 : x
  2. Step 2: Convert to fraction form
    136,888.52/188,904.12 = 76,460.18/x
  3. Step 3: Cross multiply
    136,888.52x = 188,904.12 × 76,460.18
  4. Step 4: Simplify right side
    136,888.52x = 14,443,643,017.94
  5. Step 5: Solve for x
    x = 14,443,643,017.94/136,888.52
  6. Step 6: Final answer
    x = 105,513.91

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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.