Home / 98,820.47-136,259.37-78,678.20

Finding the Fourth Proportional to 98,820.47, 136,259.37 and 78,678.20

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Solution

The fourth proportional to 98,820.47, 136,259.37 and 78,678.20 is: 108,486.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,820.47 : 136,259.37 = 78,678.20 : x
  2. Step 2: Convert to fraction form
    98,820.47/136,259.37 = 78,678.20/x
  3. Step 3: Cross multiply
    98,820.47x = 136,259.37 × 78,678.20
  4. Step 4: Simplify right side
    98,820.47x = 10,720,641,283.44
  5. Step 5: Solve for x
    x = 10,720,641,283.44/98,820.47
  6. Step 6: Final answer
    x = 108,486.04

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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.