Home / 128,276.04-177,007.20-74,549.82

Finding the Fourth Proportional to 128,276.04, 177,007.20 and 74,549.82

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Solution

The fourth proportional to 128,276.04, 177,007.20 and 74,549.82 is: 102,870.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,276.04 : 177,007.20 = 74,549.82 : x
  2. Step 2: Convert to fraction form
    128,276.04/177,007.20 = 74,549.82/x
  3. Step 3: Cross multiply
    128,276.04x = 177,007.20 × 74,549.82
  4. Step 4: Simplify right side
    128,276.04x = 13,195,854,898.70
  5. Step 5: Solve for x
    x = 13,195,854,898.70/128,276.04
  6. Step 6: Final answer
    x = 102,870.77

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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.