Home / 81,680.45-112,718.70-45,870.35

Finding the Fourth Proportional to 81,680.45, 112,718.70 and 45,870.35

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Solution

The fourth proportional to 81,680.45, 112,718.70 and 45,870.35 is: 63,300.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,680.45 : 112,718.70 = 45,870.35 : x
  2. Step 2: Convert to fraction form
    81,680.45/112,718.70 = 45,870.35/x
  3. Step 3: Cross multiply
    81,680.45x = 112,718.70 × 45,870.35
  4. Step 4: Simplify right side
    81,680.45x = 5,170,445,656.95
  5. Step 5: Solve for x
    x = 5,170,445,656.95/81,680.45
  6. Step 6: Final answer
    x = 63,300.90

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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.