Home / 81,492,987.40-122,197,490.70-30,348,680.20

Finding the Fourth Proportional to 81,492,987.40, 122,197,490.70 and 30,348,680.20

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Solution

The fourth proportional to 81,492,987.40, 122,197,490.70 and 30,348,680.20 is: 45,507,382.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,492,987.40 : 122,197,490.70 = 30,348,680.20 : x
  2. Step 2: Convert to fraction form
    81,492,987.40/122,197,490.70 = 30,348,680.20/x
  3. Step 3: Cross multiply
    81,492,987.40x = 122,197,490.70 × 30,348,680.20
  4. Step 4: Simplify right side
    81,492,987.40x = 3,708,532,566,496,774
  5. Step 5: Solve for x
    x = 3,708,532,566,496,774/81,492,987.40
  6. Step 6: Final answer
    x = 45,507,382.72

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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.