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Finding the Fourth Proportional to 225,257.89, 310,890.80 and 128,461.95

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Solution

The fourth proportional to 225,257.89, 310,890.80 and 128,461.95 is: 177,297.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,257.89 : 310,890.80 = 128,461.95 : x
  2. Step 2: Convert to fraction form
    225,257.89/310,890.80 = 128,461.95/x
  3. Step 3: Cross multiply
    225,257.89x = 310,890.80 × 128,461.95
  4. Step 4: Simplify right side
    225,257.89x = 39,937,638,405.06
  5. Step 5: Solve for x
    x = 39,937,638,405.06/225,257.89
  6. Step 6: Final answer
    x = 177,297.40

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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.