Home / 138,968.18-191,705.66-87,894.89

Finding the Fourth Proportional to 138,968.18, 191,705.66 and 87,894.89

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Solution

The fourth proportional to 138,968.18, 191,705.66 and 87,894.89 is: 121,250.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,968.18 : 191,705.66 = 87,894.89 : x
  2. Step 2: Convert to fraction form
    138,968.18/191,705.66 = 87,894.89/x
  3. Step 3: Cross multiply
    138,968.18x = 191,705.66 × 87,894.89
  4. Step 4: Simplify right side
    138,968.18x = 16,849,946,500.07
  5. Step 5: Solve for x
    x = 16,849,946,500.07/138,968.18
  6. Step 6: Final answer
    x = 121,250.40

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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.