Home / 86,515.30-129,809.40-47,100.70

Finding the Fourth Proportional to 86,515.30, 129,809.40 and 47,100.70

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Solution

The fourth proportional to 86,515.30, 129,809.40 and 47,100.70 is: 70,670.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,515.30 : 129,809.40 = 47,100.70 : x
  2. Step 2: Convert to fraction form
    86,515.30/129,809.40 = 47,100.70/x
  3. Step 3: Cross multiply
    86,515.30x = 129,809.40 × 47,100.70
  4. Step 4: Simplify right side
    86,515.30x = 6,114,113,606.58
  5. Step 5: Solve for x
    x = 6,114,113,606.58/86,515.30
  6. Step 6: Final answer
    x = 70,670.89

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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.