Home / 138,730.93-191,401.85-90,310.75

Finding the Fourth Proportional to 138,730.93, 191,401.85 and 90,310.75

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Solution

The fourth proportional to 138,730.93, 191,401.85 and 90,310.75 is: 124,598.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,730.93 : 191,401.85 = 90,310.75 : x
  2. Step 2: Convert to fraction form
    138,730.93/191,401.85 = 90,310.75/x
  3. Step 3: Cross multiply
    138,730.93x = 191,401.85 × 90,310.75
  4. Step 4: Simplify right side
    138,730.93x = 17,285,644,372.16
  5. Step 5: Solve for x
    x = 17,285,644,372.16/138,730.93
  6. Step 6: Final answer
    x = 124,598.35

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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.