Home / 81,530.90-112,416.60-75,485.06

Finding the Fourth Proportional to 81,530.90, 112,416.60 and 75,485.06

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Solution

The fourth proportional to 81,530.90, 112,416.60 and 75,485.06 is: 104,080.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,530.90 : 112,416.60 = 75,485.06 : x
  2. Step 2: Convert to fraction form
    81,530.90/112,416.60 = 75,485.06/x
  3. Step 3: Cross multiply
    81,530.90x = 112,416.60 × 75,485.06
  4. Step 4: Simplify right side
    81,530.90x = 8,485,773,796.00
  5. Step 5: Solve for x
    x = 8,485,773,796.00/81,530.90
  6. Step 6: Final answer
    x = 104,080.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.