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Finding the Fourth Proportional to 86,830.70, 130,246.05 and 49,376.30

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Solution

The fourth proportional to 86,830.70, 130,246.05 and 49,376.30 is: 74,064.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,830.70 : 130,246.05 = 49,376.30 : x
  2. Step 2: Convert to fraction form
    86,830.70/130,246.05 = 49,376.30/x
  3. Step 3: Cross multiply
    86,830.70x = 130,246.05 × 49,376.30
  4. Step 4: Simplify right side
    86,830.70x = 6,431,068,038.62
  5. Step 5: Solve for x
    x = 6,431,068,038.62/86,830.70
  6. Step 6: Final answer
    x = 74,064.45

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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.