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Finding the Fourth Proportional to 86,808.60, 130,099.50 and 47,355.12

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Solution

The fourth proportional to 86,808.60, 130,099.50 and 47,355.12 is: 70,970.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,808.60 : 130,099.50 = 47,355.12 : x
  2. Step 2: Convert to fraction form
    86,808.60/130,099.50 = 47,355.12/x
  3. Step 3: Cross multiply
    86,808.60x = 130,099.50 × 47,355.12
  4. Step 4: Simplify right side
    86,808.60x = 6,160,877,434.44
  5. Step 5: Solve for x
    x = 6,160,877,434.44/86,808.60
  6. Step 6: Final answer
    x = 70,970.82

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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.