Home / 138,528.48-191,155.50-84,828.72

Finding the Fourth Proportional to 138,528.48, 191,155.50 and 84,828.72

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Solution

The fourth proportional to 138,528.48, 191,155.50 and 84,828.72 is: 117,055.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,528.48 : 191,155.50 = 84,828.72 : x
  2. Step 2: Convert to fraction form
    138,528.48/191,155.50 = 84,828.72/x
  3. Step 3: Cross multiply
    138,528.48x = 191,155.50 × 84,828.72
  4. Step 4: Simplify right side
    138,528.48x = 16,215,476,385.96
  5. Step 5: Solve for x
    x = 16,215,476,385.96/138,528.48
  6. Step 6: Final answer
    x = 117,055.18

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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.