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Finding the Fourth Proportional to 129,567.99, 178,809.91 and 75,870.30

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Solution

The fourth proportional to 129,567.99, 178,809.91 and 75,870.30 is: 104,704.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,567.99 : 178,809.91 = 75,870.30 : x
  2. Step 2: Convert to fraction form
    129,567.99/178,809.91 = 75,870.30/x
  3. Step 3: Cross multiply
    129,567.99x = 178,809.91 × 75,870.30
  4. Step 4: Simplify right side
    129,567.99x = 13,566,361,514.67
  5. Step 5: Solve for x
    x = 13,566,361,514.67/129,567.99
  6. Step 6: Final answer
    x = 104,704.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.