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Finding the Fourth Proportional to 132,907.40, 199,130.70 and 86,136.20

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Solution

The fourth proportional to 132,907.40, 199,130.70 and 86,136.20 is: 129,054.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,907.40 : 199,130.70 = 86,136.20 : x
  2. Step 2: Convert to fraction form
    132,907.40/199,130.70 = 86,136.20/x
  3. Step 3: Cross multiply
    132,907.40x = 199,130.70 × 86,136.20
  4. Step 4: Simplify right side
    132,907.40x = 17,152,361,801.34
  5. Step 5: Solve for x
    x = 17,152,361,801.34/132,907.40
  6. Step 6: Final answer
    x = 129,054.98

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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.