Home / 81,509.12-112,495.20-45,713.60

Finding the Fourth Proportional to 81,509.12, 112,495.20 and 45,713.60

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Solution

The fourth proportional to 81,509.12, 112,495.20 and 45,713.60 is: 63,091.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,509.12 : 112,495.20 = 45,713.60 : x
  2. Step 2: Convert to fraction form
    81,509.12/112,495.20 = 45,713.60/x
  3. Step 3: Cross multiply
    81,509.12x = 112,495.20 × 45,713.60
  4. Step 4: Simplify right side
    81,509.12x = 5,142,560,574.72
  5. Step 5: Solve for x
    x = 5,142,560,574.72/81,509.12
  6. Step 6: Final answer
    x = 63,091.84

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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.