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Finding the Fourth Proportional to 255,995.04, 383,978.20 and 78,501.57

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Solution

The fourth proportional to 255,995.04, 383,978.20 and 78,501.57 is: 117,747.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,995.04 : 383,978.20 = 78,501.57 : x
  2. Step 2: Convert to fraction form
    255,995.04/383,978.20 = 78,501.57/x
  3. Step 3: Cross multiply
    255,995.04x = 383,978.20 × 78,501.57
  4. Step 4: Simplify right side
    255,995.04x = 30,142,891,545.77
  5. Step 5: Solve for x
    x = 30,142,891,545.77/255,995.04
  6. Step 6: Final answer
    x = 117,747.95

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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.