Home / 85,964,555.60-128,946,833.40-80,921,560.40

Finding the Fourth Proportional to 85,964,555.60, 128,946,833.40 and 80,921,560.40

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Solution

The fourth proportional to 85,964,555.60, 128,946,833.40 and 80,921,560.40 is: 121,382,340.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,964,555.60 : 128,946,833.40 = 80,921,560.40 : x
  2. Step 2: Convert to fraction form
    85,964,555.60/128,946,833.40 = 80,921,560.40/x
  3. Step 3: Cross multiply
    85,964,555.60x = 128,946,833.40 × 80,921,560.40
  4. Step 4: Simplify right side
    85,964,555.60x = 10,434,578,967,366,838
  5. Step 5: Solve for x
    x = 10,434,578,967,366,838/85,964,555.60
  6. Step 6: Final answer
    x = 121,382,340.60

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1.5x scale

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.