Home / 153,921.90-212,415.54-85,011.18

Finding the Fourth Proportional to 153,921.90, 212,415.54 and 85,011.18

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Solution

The fourth proportional to 153,921.90, 212,415.54 and 85,011.18 is: 117,317.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,921.90 : 212,415.54 = 85,011.18 : x
  2. Step 2: Convert to fraction form
    153,921.90/212,415.54 = 85,011.18/x
  3. Step 3: Cross multiply
    153,921.90x = 212,415.54 × 85,011.18
  4. Step 4: Simplify right side
    153,921.90x = 18,057,695,705.74
  5. Step 5: Solve for x
    x = 18,057,695,705.74/153,921.90
  6. Step 6: Final answer
    x = 117,317.26

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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.