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Finding the Fourth Proportional to 128,125.40, 191,669.70 and 112,573.40

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Solution

The fourth proportional to 128,125.40, 191,669.70 and 112,573.40 is: 168,404.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,125.40 : 191,669.70 = 112,573.40 : x
  2. Step 2: Convert to fraction form
    128,125.40/191,669.70 = 112,573.40/x
  3. Step 3: Cross multiply
    128,125.40x = 191,669.70 × 112,573.40
  4. Step 4: Simplify right side
    128,125.40x = 21,576,909,805.98
  5. Step 5: Solve for x
    x = 21,576,909,805.98/128,125.40
  6. Step 6: Final answer
    x = 168,404.62

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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.