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Finding the Fourth Proportional to 286,525.80, 429,679.35 and 86,779.80

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Solution

The fourth proportional to 286,525.80, 429,679.35 and 86,779.80 is: 130,136.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,525.80 : 429,679.35 = 86,779.80 : x
  2. Step 2: Convert to fraction form
    286,525.80/429,679.35 = 86,779.80/x
  3. Step 3: Cross multiply
    286,525.80x = 429,679.35 × 86,779.80
  4. Step 4: Simplify right side
    286,525.80x = 37,287,488,057.13
  5. Step 5: Solve for x
    x = 37,287,488,057.13/286,525.80
  6. Step 6: Final answer
    x = 130,136.58

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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.