Home / 85,604,405.78-128,429,776.18-61,043,361.76

Finding the Fourth Proportional to 85,604,405.78, 128,429,776.18 and 61,043,361.76

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Solution

The fourth proportional to 85,604,405.78, 128,429,776.18 and 61,043,361.76 is: 91,581,563.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,604,405.78 : 128,429,776.18 = 61,043,361.76 : x
  2. Step 2: Convert to fraction form
    85,604,405.78/128,429,776.18 = 61,043,361.76/x
  3. Step 3: Cross multiply
    85,604,405.78x = 128,429,776.18 × 61,043,361.76
  4. Step 4: Simplify right side
    85,604,405.78x = 7,839,785,288,348,412
  5. Step 5: Solve for x
    x = 7,839,785,288,348,412/85,604,405.78
  6. Step 6: Final answer
    x = 91,581,563.08

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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.