Home / 134,640.09-185,792.40-78,055.11

Finding the Fourth Proportional to 134,640.09, 185,792.40 and 78,055.11

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Solution

The fourth proportional to 134,640.09, 185,792.40 and 78,055.11 is: 107,709.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,640.09 : 185,792.40 = 78,055.11 : x
  2. Step 2: Convert to fraction form
    134,640.09/185,792.40 = 78,055.11/x
  3. Step 3: Cross multiply
    134,640.09x = 185,792.40 × 78,055.11
  4. Step 4: Simplify right side
    134,640.09x = 14,502,046,219.16
  5. Step 5: Solve for x
    x = 14,502,046,219.16/134,640.09
  6. Step 6: Final answer
    x = 107,709.72

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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.