Home / 78,448.65-108,259.26-42,638.58

Finding the Fourth Proportional to 78,448.65, 108,259.26 and 42,638.58

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Solution

The fourth proportional to 78,448.65, 108,259.26 and 42,638.58 is: 58,841.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,448.65 : 108,259.26 = 42,638.58 : x
  2. Step 2: Convert to fraction form
    78,448.65/108,259.26 = 42,638.58/x
  3. Step 3: Cross multiply
    78,448.65x = 108,259.26 × 42,638.58
  4. Step 4: Simplify right side
    78,448.65x = 4,616,021,118.25
  5. Step 5: Solve for x
    x = 4,616,021,118.25/78,448.65
  6. Step 6: Final answer
    x = 58,841.31

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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.