Home / 78,939.51-108,933.28-43,130.75

Finding the Fourth Proportional to 78,939.51, 108,933.28 and 43,130.75

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Solution

The fourth proportional to 78,939.51, 108,933.28 and 43,130.75 is: 59,518.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,939.51 : 108,933.28 = 43,130.75 : x
  2. Step 2: Convert to fraction form
    78,939.51/108,933.28 = 43,130.75/x
  3. Step 3: Cross multiply
    78,939.51x = 108,933.28 × 43,130.75
  4. Step 4: Simplify right side
    78,939.51x = 4,698,374,066.36
  5. Step 5: Solve for x
    x = 4,698,374,066.36/78,939.51
  6. Step 6: Final answer
    x = 59,518.66

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1.5x scale

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.