Home / 258,583.60-387,875.34-81,106.12

Finding the Fourth Proportional to 258,583.60, 387,875.34 and 81,106.12

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Solution

The fourth proportional to 258,583.60, 387,875.34 and 81,106.12 is: 121,659.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,583.60 : 387,875.34 = 81,106.12 : x
  2. Step 2: Convert to fraction form
    258,583.60/387,875.34 = 81,106.12/x
  3. Step 3: Cross multiply
    258,583.60x = 387,875.34 × 81,106.12
  4. Step 4: Simplify right side
    258,583.60x = 31,459,063,871.08
  5. Step 5: Solve for x
    x = 31,459,063,871.08/258,583.60
  6. Step 6: Final answer
    x = 121,659.16

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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.