Home / 109,109.28-149,918.28-86,714.40

Finding the Fourth Proportional to 109,109.28, 149,918.28 and 86,714.40

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Solution

The fourth proportional to 109,109.28, 149,918.28 and 86,714.40 is: 119,147.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,109.28 : 149,918.28 = 86,714.40 : x
  2. Step 2: Convert to fraction form
    109,109.28/149,918.28 = 86,714.40/x
  3. Step 3: Cross multiply
    109,109.28x = 149,918.28 × 86,714.40
  4. Step 4: Simplify right side
    109,109.28x = 13,000,073,699.23
  5. Step 5: Solve for x
    x = 13,000,073,699.23/109,109.28
  6. Step 6: Final answer
    x = 119,147.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.