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Finding the Fourth Proportional to 126,580.50, 189,746.55 and 70,447.50

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Solution

The fourth proportional to 126,580.50, 189,746.55 and 70,447.50 is: 105,602.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,580.50 : 189,746.55 = 70,447.50 : x
  2. Step 2: Convert to fraction form
    126,580.50/189,746.55 = 70,447.50/x
  3. Step 3: Cross multiply
    126,580.50x = 189,746.55 × 70,447.50
  4. Step 4: Simplify right side
    126,580.50x = 13,367,170,081.13
  5. Step 5: Solve for x
    x = 13,367,170,081.13/126,580.50
  6. Step 6: Final answer
    x = 105,602.13

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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.