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Finding the Fourth Proportional to 86,949.70, 130,424.55 and 85,200.10

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Solution

The fourth proportional to 86,949.70, 130,424.55 and 85,200.10 is: 127,800.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,949.70 : 130,424.55 = 85,200.10 : x
  2. Step 2: Convert to fraction form
    86,949.70/130,424.55 = 85,200.10/x
  3. Step 3: Cross multiply
    86,949.70x = 130,424.55 × 85,200.10
  4. Step 4: Simplify right side
    86,949.70x = 11,112,184,702.46
  5. Step 5: Solve for x
    x = 11,112,184,702.46/86,949.70
  6. Step 6: Final answer
    x = 127,800.15

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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.