Home / 128,113.40-176,783.00-74,387.90

Finding the Fourth Proportional to 128,113.40, 176,783.00 and 74,387.90

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Solution

The fourth proportional to 128,113.40, 176,783.00 and 74,387.90 is: 102,647.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,113.40 : 176,783.00 = 74,387.90 : x
  2. Step 2: Convert to fraction form
    128,113.40/176,783.00 = 74,387.90/x
  3. Step 3: Cross multiply
    128,113.40x = 176,783.00 × 74,387.90
  4. Step 4: Simplify right side
    128,113.40x = 13,150,514,869.85
  5. Step 5: Solve for x
    x = 13,150,514,869.85/128,113.40
  6. Step 6: Final answer
    x = 102,647.46

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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.