Home / 86,646.24-129,673.66-72,622.10

Finding the Fourth Proportional to 86,646.24, 129,673.66 and 72,622.10

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Solution

The fourth proportional to 86,646.24, 129,673.66 and 72,622.10 is: 108,685.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,646.24 : 129,673.66 = 72,622.10 : x
  2. Step 2: Convert to fraction form
    86,646.24/129,673.66 = 72,622.10/x
  3. Step 3: Cross multiply
    86,646.24x = 129,673.66 × 72,622.10
  4. Step 4: Simplify right side
    86,646.24x = 9,417,173,503.89
  5. Step 5: Solve for x
    x = 9,417,173,503.89/86,646.24
  6. Step 6: Final answer
    x = 108,685.31

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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.