Home / 128,019.12-176,666.58-71,429.28

Finding the Fourth Proportional to 128,019.12, 176,666.58 and 71,429.28

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Solution

The fourth proportional to 128,019.12, 176,666.58 and 71,429.28 is: 98,572.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,019.12 : 176,666.58 = 71,429.28 : x
  2. Step 2: Convert to fraction form
    128,019.12/176,666.58 = 71,429.28/x
  3. Step 3: Cross multiply
    128,019.12x = 176,666.58 × 71,429.28
  4. Step 4: Simplify right side
    128,019.12x = 12,619,166,609.46
  5. Step 5: Solve for x
    x = 12,619,166,609.46/128,019.12
  6. Step 6: Final answer
    x = 98,572.51

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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.