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Finding the Fourth Proportional to 255,834.01, 383,751.95 and 78,340.30

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Solution

The fourth proportional to 255,834.01, 383,751.95 and 78,340.30 is: 117,510.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,834.01 : 383,751.95 = 78,340.30 : x
  2. Step 2: Convert to fraction form
    255,834.01/383,751.95 = 78,340.30/x
  3. Step 3: Cross multiply
    255,834.01x = 383,751.95 × 78,340.30
  4. Step 4: Simplify right side
    255,834.01x = 30,063,242,888.59
  5. Step 5: Solve for x
    x = 30,063,242,888.59/255,834.01
  6. Step 6: Final answer
    x = 117,510.74

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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.