Home / 86,714.20-129,984.90-39,885.40

Finding the Fourth Proportional to 86,714.20, 129,984.90 and 39,885.40

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Solution

The fourth proportional to 86,714.20, 129,984.90 and 39,885.40 is: 59,788.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,714.20 : 129,984.90 = 39,885.40 : x
  2. Step 2: Convert to fraction form
    86,714.20/129,984.90 = 39,885.40/x
  3. Step 3: Cross multiply
    86,714.20x = 129,984.90 × 39,885.40
  4. Step 4: Simplify right side
    86,714.20x = 5,184,499,730.46
  5. Step 5: Solve for x
    x = 5,184,499,730.46/86,714.20
  6. Step 6: Final answer
    x = 59,788.36

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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.