Home / 138,652.05-191,341.65-78,222.48

Finding the Fourth Proportional to 138,652.05, 191,341.65 and 78,222.48

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Solution

The fourth proportional to 138,652.05, 191,341.65 and 78,222.48 is: 107,948.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,652.05 : 191,341.65 = 78,222.48 : x
  2. Step 2: Convert to fraction form
    138,652.05/191,341.65 = 78,222.48/x
  3. Step 3: Cross multiply
    138,652.05x = 191,341.65 × 78,222.48
  4. Step 4: Simplify right side
    138,652.05x = 14,967,218,390.29
  5. Step 5: Solve for x
    x = 14,967,218,390.29/138,652.05
  6. Step 6: Final answer
    x = 107,948.05

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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.