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Finding the Fourth Proportional to 86,937.70, 130,114.95 and 76,440.10

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Solution

The fourth proportional to 86,937.70, 130,114.95 and 76,440.10 is: 114,403.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,937.70 : 130,114.95 = 76,440.10 : x
  2. Step 2: Convert to fraction form
    86,937.70/130,114.95 = 76,440.10/x
  3. Step 3: Cross multiply
    86,937.70x = 130,114.95 × 76,440.10
  4. Step 4: Simplify right side
    86,937.70x = 9,945,999,789.50
  5. Step 5: Solve for x
    x = 9,945,999,789.50/86,937.70
  6. Step 6: Final answer
    x = 114,403.76

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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.