Home / 86,865.70-130,045-53,485.60

Finding the Fourth Proportional to 86,865.70, 130,045 and 53,485.60

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Solution

The fourth proportional to 86,865.70, 130,045 and 53,485.60 is: 80,072.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,865.70 : 130,045 = 53,485.60 : x
  2. Step 2: Convert to fraction form
    86,865.70/130,045 = 53,485.60/x
  3. Step 3: Cross multiply
    86,865.70x = 130,045 × 53,485.60
  4. Step 4: Simplify right side
    86,865.70x = 6,955,534,852
  5. Step 5: Solve for x
    x = 6,955,534,852/86,865.70
  6. Step 6: Final answer
    x = 80,072.28

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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.