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Finding the Fourth Proportional to 219,123.40, 329,030.70 and 125,811.40

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Solution

The fourth proportional to 219,123.40, 329,030.70 and 125,811.40 is: 188,915.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,123.40 : 329,030.70 = 125,811.40 : x
  2. Step 2: Convert to fraction form
    219,123.40/329,030.70 = 125,811.40/x
  3. Step 3: Cross multiply
    219,123.40x = 329,030.70 × 125,811.40
  4. Step 4: Simplify right side
    219,123.40x = 41,395,813,009.98
  5. Step 5: Solve for x
    x = 41,395,813,009.98/219,123.40
  6. Step 6: Final answer
    x = 188,915.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.