Home / 85,804,856.76-128,679,952.50-28,286,406.84

Finding the Fourth Proportional to 85,804,856.76, 128,679,952.50 and 28,286,406.84

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Solution

The fourth proportional to 85,804,856.76, 128,679,952.50 and 28,286,406.84 is: 42,420,599.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,804,856.76 : 128,679,952.50 = 28,286,406.84 : x
  2. Step 2: Convert to fraction form
    85,804,856.76/128,679,952.50 = 28,286,406.84/x
  3. Step 3: Cross multiply
    85,804,856.76x = 128,679,952.50 × 28,286,406.84
  4. Step 4: Simplify right side
    85,804,856.76x = 3,639,893,488,566,875
  5. Step 5: Solve for x
    x = 3,639,893,488,566,875/85,804,856.76
  6. Step 6: Final answer
    x = 42,420,599.79

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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.