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Finding the Fourth Proportional to 86,041.63, 118,671.64 and 75,412.81

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Solution

The fourth proportional to 86,041.63, 118,671.64 and 75,412.81 is: 104,012.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,041.63 : 118,671.64 = 75,412.81 : x
  2. Step 2: Convert to fraction form
    86,041.63/118,671.64 = 75,412.81/x
  3. Step 3: Cross multiply
    86,041.63x = 118,671.64 × 75,412.81
  4. Step 4: Simplify right side
    86,041.63x = 8,949,361,839.71
  5. Step 5: Solve for x
    x = 8,949,361,839.71/86,041.63
  6. Step 6: Final answer
    x = 104,012.00

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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.