Home / 85,415,205.40-128,122,808.10-71,054,488.60

Finding the Fourth Proportional to 85,415,205.40, 128,122,808.10 and 71,054,488.60

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Solution

The fourth proportional to 85,415,205.40, 128,122,808.10 and 71,054,488.60 is: 106,581,732.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,415,205.40 : 128,122,808.10 = 71,054,488.60 : x
  2. Step 2: Convert to fraction form
    85,415,205.40/128,122,808.10 = 71,054,488.60/x
  3. Step 3: Cross multiply
    85,415,205.40x = 128,122,808.10 × 71,054,488.60
  4. Step 4: Simplify right side
    85,415,205.40x = 9,103,700,607,541,436
  5. Step 5: Solve for x
    x = 9,103,700,607,541,436/85,415,205.40
  6. Step 6: Final answer
    x = 106,581,732.90

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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.