Home / 85,839,991.40-128,759,987.10-76,434,141.80

Finding the Fourth Proportional to 85,839,991.40, 128,759,987.10 and 76,434,141.80

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Solution

The fourth proportional to 85,839,991.40, 128,759,987.10 and 76,434,141.80 is: 114,651,212.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839,991.40 : 128,759,987.10 = 76,434,141.80 : x
  2. Step 2: Convert to fraction form
    85,839,991.40/128,759,987.10 = 76,434,141.80/x
  3. Step 3: Cross multiply
    85,839,991.40x = 128,759,987.10 × 76,434,141.80
  4. Step 4: Simplify right side
    85,839,991.40x = 9,841,659,112,167,570
  5. Step 5: Solve for x
    x = 9,841,659,112,167,570/85,839,991.40
  6. Step 6: Final answer
    x = 114,651,212.70

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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.