Home / 115,308.20-172,962.30-91,980.20

Finding the Fourth Proportional to 115,308.20, 172,962.30 and 91,980.20

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Solution

The fourth proportional to 115,308.20, 172,962.30 and 91,980.20 is: 137,970.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,308.20 : 172,962.30 = 91,980.20 : x
  2. Step 2: Convert to fraction form
    115,308.20/172,962.30 = 91,980.20/x
  3. Step 3: Cross multiply
    115,308.20x = 172,962.30 × 91,980.20
  4. Step 4: Simplify right side
    115,308.20x = 15,909,106,946.46
  5. Step 5: Solve for x
    x = 15,909,106,946.46/115,308.20
  6. Step 6: Final answer
    x = 137,970.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.