Home / 128,102.13-176,818.48-74,411.28

Finding the Fourth Proportional to 128,102.13, 176,818.48 and 74,411.28

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Solution

The fourth proportional to 128,102.13, 176,818.48 and 74,411.28 is: 102,709.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,102.13 : 176,818.48 = 74,411.28 : x
  2. Step 2: Convert to fraction form
    128,102.13/176,818.48 = 74,411.28/x
  3. Step 3: Cross multiply
    128,102.13x = 176,818.48 × 74,411.28
  4. Step 4: Simplify right side
    128,102.13x = 13,157,289,238.43
  5. Step 5: Solve for x
    x = 13,157,289,238.43/128,102.13
  6. Step 6: Final answer
    x = 102,709.37

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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.