Home / 128,035.16-176,679.06-74,311.51

Finding the Fourth Proportional to 128,035.16, 176,679.06 and 74,311.51

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Solution

The fourth proportional to 128,035.16, 176,679.06 and 74,311.51 is: 102,544.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,035.16 : 176,679.06 = 74,311.51 : x
  2. Step 2: Convert to fraction form
    128,035.16/176,679.06 = 74,311.51/x
  3. Step 3: Cross multiply
    128,035.16x = 176,679.06 × 74,311.51
  4. Step 4: Simplify right side
    128,035.16x = 13,129,287,478.06
  5. Step 5: Solve for x
    x = 13,129,287,478.06/128,035.16
  6. Step 6: Final answer
    x = 102,544.39

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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.