Home / 78,918.06-108,909.54-43,111.40

Finding the Fourth Proportional to 78,918.06, 108,909.54 and 43,111.40

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Solution

The fourth proportional to 78,918.06, 108,909.54 and 43,111.40 is: 59,495.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,918.06 : 108,909.54 = 43,111.40 : x
  2. Step 2: Convert to fraction form
    78,918.06/108,909.54 = 43,111.40/x
  3. Step 3: Cross multiply
    78,918.06x = 108,909.54 × 43,111.40
  4. Step 4: Simplify right side
    78,918.06x = 4,695,242,742.76
  5. Step 5: Solve for x
    x = 4,695,242,742.76/78,918.06
  6. Step 6: Final answer
    x = 59,495.16

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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.