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Finding the Fourth Proportional to 86,130.69, 118,870.21 and 47,894.05

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Solution

The fourth proportional to 86,130.69, 118,870.21 and 47,894.05 is: 66,099.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,130.69 : 118,870.21 = 47,894.05 : x
  2. Step 2: Convert to fraction form
    86,130.69/118,870.21 = 47,894.05/x
  3. Step 3: Cross multiply
    86,130.69x = 118,870.21 × 47,894.05
  4. Step 4: Simplify right side
    86,130.69x = 5,693,175,541.78
  5. Step 5: Solve for x
    x = 5,693,175,541.78/86,130.69
  6. Step 6: Final answer
    x = 66,099.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.