Home / 385,909.70-578,864.55-105,426.95

Finding the Fourth Proportional to 385,909.70, 578,864.55 and 105,426.95

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Solution

The fourth proportional to 385,909.70, 578,864.55 and 105,426.95 is: 158,140.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,909.70 : 578,864.55 = 105,426.95 : x
  2. Step 2: Convert to fraction form
    385,909.70/578,864.55 = 105,426.95/x
  3. Step 3: Cross multiply
    385,909.70x = 578,864.55 × 105,426.95
  4. Step 4: Simplify right side
    385,909.70x = 61,027,923,969.62
  5. Step 5: Solve for x
    x = 61,027,923,969.62/385,909.70
  6. Step 6: Final answer
    x = 158,140.43

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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.