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Finding the Fourth Proportional to 86,870.70, 130,325.16 and 49,448.40

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Solution

The fourth proportional to 86,870.70, 130,325.16 and 49,448.40 is: 74,183.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,870.70 : 130,325.16 = 49,448.40 : x
  2. Step 2: Convert to fraction form
    86,870.70/130,325.16 = 49,448.40/x
  3. Step 3: Cross multiply
    86,870.70x = 130,325.16 × 49,448.40
  4. Step 4: Simplify right side
    86,870.70x = 6,444,370,641.74
  5. Step 5: Solve for x
    x = 6,444,370,641.74/86,870.70
  6. Step 6: Final answer
    x = 74,183.48

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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.