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Finding the Fourth Proportional to 127,885.70, 191,569.35 and 72,416.90

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Solution

The fourth proportional to 127,885.70, 191,569.35 and 72,416.90 is: 108,478.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,885.70 : 191,569.35 = 72,416.90 : x
  2. Step 2: Convert to fraction form
    127,885.70/191,569.35 = 72,416.90/x
  3. Step 3: Cross multiply
    127,885.70x = 191,569.35 × 72,416.90
  4. Step 4: Simplify right side
    127,885.70x = 13,872,858,462.02
  5. Step 5: Solve for x
    x = 13,872,858,462.02/127,885.70
  6. Step 6: Final answer
    x = 108,478.57

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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.