Home / 81,215.40-112,111.80-49,394.52

Finding the Fourth Proportional to 81,215.40, 112,111.80 and 49,394.52

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Solution

The fourth proportional to 81,215.40, 112,111.80 and 49,394.52 is: 68,185.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,215.40 : 112,111.80 = 49,394.52 : x
  2. Step 2: Convert to fraction form
    81,215.40/112,111.80 = 49,394.52/x
  3. Step 3: Cross multiply
    81,215.40x = 112,111.80 × 49,394.52
  4. Step 4: Simplify right side
    81,215.40x = 5,537,708,547.34
  5. Step 5: Solve for x
    x = 5,537,708,547.34/81,215.40
  6. Step 6: Final answer
    x = 68,185.45

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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.