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Finding the Fourth Proportional to 86,741.70, 130,112.55 and 51,749.70

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Solution

The fourth proportional to 86,741.70, 130,112.55 and 51,749.70 is: 77,624.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,741.70 : 130,112.55 = 51,749.70 : x
  2. Step 2: Convert to fraction form
    86,741.70/130,112.55 = 51,749.70/x
  3. Step 3: Cross multiply
    86,741.70x = 130,112.55 × 51,749.70
  4. Step 4: Simplify right side
    86,741.70x = 6,733,285,428.74
  5. Step 5: Solve for x
    x = 6,733,285,428.74/86,741.70
  6. Step 6: Final answer
    x = 77,624.55

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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.