Home / 128,536.60-177,379.28-74,068.76

Finding the Fourth Proportional to 128,536.60, 177,379.28 and 74,068.76

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Solution

The fourth proportional to 128,536.60, 177,379.28 and 74,068.76 is: 102,214.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,536.60 : 177,379.28 = 74,068.76 : x
  2. Step 2: Convert to fraction form
    128,536.60/177,379.28 = 74,068.76/x
  3. Step 3: Cross multiply
    128,536.60x = 177,379.28 × 74,068.76
  4. Step 4: Simplify right side
    128,536.60x = 13,138,262,727.22
  5. Step 5: Solve for x
    x = 13,138,262,727.22/128,536.60
  6. Step 6: Final answer
    x = 102,214.18

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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.