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Finding the Fourth Proportional to 86,951.40, 130,427.10 and 69,455.40

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Solution

The fourth proportional to 86,951.40, 130,427.10 and 69,455.40 is: 104,183.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,951.40 : 130,427.10 = 69,455.40 : x
  2. Step 2: Convert to fraction form
    86,951.40/130,427.10 = 69,455.40/x
  3. Step 3: Cross multiply
    86,951.40x = 130,427.10 × 69,455.40
  4. Step 4: Simplify right side
    86,951.40x = 9,058,866,401.34
  5. Step 5: Solve for x
    x = 9,058,866,401.34/86,951.40
  6. Step 6: Final answer
    x = 104,183.10

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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.