Home / 72,079.26-99,419.31-66,130.62

Finding the Fourth Proportional to 72,079.26, 99,419.31 and 66,130.62

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Solution

The fourth proportional to 72,079.26, 99,419.31 and 66,130.62 is: 91,214.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,079.26 : 99,419.31 = 66,130.62 : x
  2. Step 2: Convert to fraction form
    72,079.26/99,419.31 = 66,130.62/x
  3. Step 3: Cross multiply
    72,079.26x = 99,419.31 × 66,130.62
  4. Step 4: Simplify right side
    72,079.26x = 6,574,660,610.27
  5. Step 5: Solve for x
    x = 6,574,660,610.27/72,079.26
  6. Step 6: Final answer
    x = 91,214.32

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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.