Home / 138,669.60-191,432.64-87,727.20

Finding the Fourth Proportional to 138,669.60, 191,432.64 and 87,727.20

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Solution

The fourth proportional to 138,669.60, 191,432.64 and 87,727.20 is: 121,106.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,669.60 : 191,432.64 = 87,727.20 : x
  2. Step 2: Convert to fraction form
    138,669.60/191,432.64 = 87,727.20/x
  3. Step 3: Cross multiply
    138,669.60x = 191,432.64 × 87,727.20
  4. Step 4: Simplify right side
    138,669.60x = 16,793,849,495.81
  5. Step 5: Solve for x
    x = 16,793,849,495.81/138,669.60
  6. Step 6: Final answer
    x = 121,106.93

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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.