Home / 78,448.31-108,259.51-42,638.33

Finding the Fourth Proportional to 78,448.31, 108,259.51 and 42,638.33

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Solution

The fourth proportional to 78,448.31, 108,259.51 and 42,638.33 is: 58,841.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,448.31 : 108,259.51 = 42,638.33 : x
  2. Step 2: Convert to fraction form
    78,448.31/108,259.51 = 42,638.33/x
  3. Step 3: Cross multiply
    78,448.31x = 108,259.51 × 42,638.33
  4. Step 4: Simplify right side
    78,448.31x = 4,616,004,713.02
  5. Step 5: Solve for x
    x = 4,616,004,713.02/78,448.31
  6. Step 6: Final answer
    x = 58,841.35

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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.