Home / 85,366,887.20-128,050,330.80-80,440,013.60

Finding the Fourth Proportional to 85,366,887.20, 128,050,330.80 and 80,440,013.60

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Solution

The fourth proportional to 85,366,887.20, 128,050,330.80 and 80,440,013.60 is: 120,660,020.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,366,887.20 : 128,050,330.80 = 80,440,013.60 : x
  2. Step 2: Convert to fraction form
    85,366,887.20/128,050,330.80 = 80,440,013.60/x
  3. Step 3: Cross multiply
    85,366,887.20x = 128,050,330.80 × 80,440,013.60
  4. Step 4: Simplify right side
    85,366,887.20x = 10,300,370,351,036,498
  5. Step 5: Solve for x
    x = 10,300,370,351,036,498/85,366,887.20
  6. Step 6: Final answer
    x = 120,660,020.40

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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.