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Finding the Fourth Proportional to 86,899.70, 130,361.70 and 36,979.40

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Solution

The fourth proportional to 86,899.70, 130,361.70 and 36,979.40 is: 55,474.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,899.70 : 130,361.70 = 36,979.40 : x
  2. Step 2: Convert to fraction form
    86,899.70/130,361.70 = 36,979.40/x
  3. Step 3: Cross multiply
    86,899.70x = 130,361.70 × 36,979.40
  4. Step 4: Simplify right side
    86,899.70x = 4,820,697,448.98
  5. Step 5: Solve for x
    x = 4,820,697,448.98/86,899.70
  6. Step 6: Final answer
    x = 55,474.27

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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.