Home / 134,971.79-186,261.06-78,386.81

Finding the Fourth Proportional to 134,971.79, 186,261.06 and 78,386.81

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Solution

The fourth proportional to 134,971.79, 186,261.06 and 78,386.81 is: 108,173.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,971.79 : 186,261.06 = 78,386.81 : x
  2. Step 2: Convert to fraction form
    134,971.79/186,261.06 = 78,386.81/x
  3. Step 3: Cross multiply
    134,971.79x = 186,261.06 × 78,386.81
  4. Step 4: Simplify right side
    134,971.79x = 14,600,409,389.31
  5. Step 5: Solve for x
    x = 14,600,409,389.31/134,971.79
  6. Step 6: Final answer
    x = 108,173.79

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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.