Home / 128,113.90-176,783.69-74,388.40

Finding the Fourth Proportional to 128,113.90, 176,783.69 and 74,388.40

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Solution

The fourth proportional to 128,113.90, 176,783.69 and 74,388.40 is: 102,648.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,113.90 : 176,783.69 = 74,388.40 : x
  2. Step 2: Convert to fraction form
    128,113.90/176,783.69 = 74,388.40/x
  3. Step 3: Cross multiply
    128,113.90x = 176,783.69 × 74,388.40
  4. Step 4: Simplify right side
    128,113.90x = 13,150,654,589.34
  5. Step 5: Solve for x
    x = 13,150,654,589.34/128,113.90
  6. Step 6: Final answer
    x = 102,648.15

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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.