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Finding the Fourth Proportional to 86,839.60, 130,259.40 and 51,264.40

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Solution

The fourth proportional to 86,839.60, 130,259.40 and 51,264.40 is: 76,896.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,839.60 : 130,259.40 = 51,264.40 : x
  2. Step 2: Convert to fraction form
    86,839.60/130,259.40 = 51,264.40/x
  3. Step 3: Cross multiply
    86,839.60x = 130,259.40 × 51,264.40
  4. Step 4: Simplify right side
    86,839.60x = 6,677,669,985.36
  5. Step 5: Solve for x
    x = 6,677,669,985.36/86,839.60
  6. Step 6: Final answer
    x = 76,896.60

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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.