Home / 85,536,047.20-128,052,128.40-80,553,186.40

Finding the Fourth Proportional to 85,536,047.20, 128,052,128.40 and 80,553,186.40

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Solution

The fourth proportional to 85,536,047.20, 128,052,128.40 and 80,553,186.40 is: 120,592,513.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,536,047.20 : 128,052,128.40 = 80,553,186.40 : x
  2. Step 2: Convert to fraction form
    85,536,047.20/128,052,128.40 = 80,553,186.40/x
  3. Step 3: Cross multiply
    85,536,047.20x = 128,052,128.40 × 80,553,186.40
  4. Step 4: Simplify right side
    85,536,047.20x = 10,315,006,967,921,936
  5. Step 5: Solve for x
    x = 10,315,006,967,921,936/85,536,047.20
  6. Step 6: Final answer
    x = 120,592,513.98

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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.