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Finding the Fourth Proportional to 225,017.02, 310,512.57 and 128,243.53

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Solution

The fourth proportional to 225,017.02, 310,512.57 and 128,243.53 is: 176,969.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,017.02 : 310,512.57 = 128,243.53 : x
  2. Step 2: Convert to fraction form
    225,017.02/310,512.57 = 128,243.53/x
  3. Step 3: Cross multiply
    225,017.02x = 310,512.57 × 128,243.53
  4. Step 4: Simplify right side
    225,017.02x = 39,821,226,533.61
  5. Step 5: Solve for x
    x = 39,821,226,533.61/225,017.02
  6. Step 6: Final answer
    x = 176,969.85

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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.