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Finding the Fourth Proportional to 127,431.95, 175,856.74 and 70,074.95

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Solution

The fourth proportional to 127,431.95, 175,856.74 and 70,074.95 is: 96,703.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,431.95 : 175,856.74 = 70,074.95 : x
  2. Step 2: Convert to fraction form
    127,431.95/175,856.74 = 70,074.95/x
  3. Step 3: Cross multiply
    127,431.95x = 175,856.74 × 70,074.95
  4. Step 4: Simplify right side
    127,431.95x = 12,323,151,208.19
  5. Step 5: Solve for x
    x = 12,323,151,208.19/127,431.95
  6. Step 6: Final answer
    x = 96,703.78

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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.