Home / 153,783.35-212,221.18-90,121.20

Finding the Fourth Proportional to 153,783.35, 212,221.18 and 90,121.20

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Solution

The fourth proportional to 153,783.35, 212,221.18 and 90,121.20 is: 124,367.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,783.35 : 212,221.18 = 90,121.20 : x
  2. Step 2: Convert to fraction form
    153,783.35/212,221.18 = 90,121.20/x
  3. Step 3: Cross multiply
    153,783.35x = 212,221.18 × 90,121.20
  4. Step 4: Simplify right side
    153,783.35x = 19,125,627,407.02
  5. Step 5: Solve for x
    x = 19,125,627,407.02/153,783.35
  6. Step 6: Final answer
    x = 124,367.35

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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.