Home / 81,287.13-112,214.59-61,151.68

Finding the Fourth Proportional to 81,287.13, 112,214.59 and 61,151.68

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Solution

The fourth proportional to 81,287.13, 112,214.59 and 61,151.68 is: 84,418.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,287.13 : 112,214.59 = 61,151.68 : x
  2. Step 2: Convert to fraction form
    81,287.13/112,214.59 = 61,151.68/x
  3. Step 3: Cross multiply
    81,287.13x = 112,214.59 × 61,151.68
  4. Step 4: Simplify right side
    81,287.13x = 6,862,110,699.01
  5. Step 5: Solve for x
    x = 6,862,110,699.01/81,287.13
  6. Step 6: Final answer
    x = 84,418.17

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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.