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Finding the Fourth Proportional to 138,065.84, 190,870.38 and 136,802.84

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Solution

The fourth proportional to 138,065.84, 190,870.38 and 136,802.84 is: 189,124.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,065.84 : 190,870.38 = 136,802.84 : x
  2. Step 2: Convert to fraction form
    138,065.84/190,870.38 = 136,802.84/x
  3. Step 3: Cross multiply
    138,065.84x = 190,870.38 × 136,802.84
  4. Step 4: Simplify right side
    138,065.84x = 26,111,610,055.88
  5. Step 5: Solve for x
    x = 26,111,610,055.88/138,065.84
  6. Step 6: Final answer
    x = 189,124.33

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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.