Home / 128,083.18-191,731.08-109,187.50

Finding the Fourth Proportional to 128,083.18, 191,731.08 and 109,187.50

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Solution

The fourth proportional to 128,083.18, 191,731.08 and 109,187.50 is: 163,445.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,083.18 : 191,731.08 = 109,187.50 : x
  2. Step 2: Convert to fraction form
    128,083.18/191,731.08 = 109,187.50/x
  3. Step 3: Cross multiply
    128,083.18x = 191,731.08 × 109,187.50
  4. Step 4: Simplify right side
    128,083.18x = 20,934,637,297.50
  5. Step 5: Solve for x
    x = 20,934,637,297.50/128,083.18
  6. Step 6: Final answer
    x = 163,445.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.