Home / 81,300,339.60-112,039,416.92-79,806,006.24

Finding the Fourth Proportional to 81,300,339.60, 112,039,416.92 and 79,806,006.24

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Solution

The fourth proportional to 81,300,339.60, 112,039,416.92 and 79,806,006.24 is: 109,980,086.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,300,339.60 : 112,039,416.92 = 79,806,006.24 : x
  2. Step 2: Convert to fraction form
    81,300,339.60/112,039,416.92 = 79,806,006.24/x
  3. Step 3: Cross multiply
    81,300,339.60x = 112,039,416.92 × 79,806,006.24
  4. Step 4: Simplify right side
    81,300,339.60x = 8,941,418,405,843,481
  5. Step 5: Solve for x
    x = 8,941,418,405,843,481/81,300,339.60
  6. Step 6: Final answer
    x = 109,980,086.80

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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.