Home / 153,991.26-212,509.56-90,330.12

Finding the Fourth Proportional to 153,991.26, 212,509.56 and 90,330.12

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Solution

The fourth proportional to 153,991.26, 212,509.56 and 90,330.12 is: 124,656.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,991.26 : 212,509.56 = 90,330.12 : x
  2. Step 2: Convert to fraction form
    153,991.26/212,509.56 = 90,330.12/x
  3. Step 3: Cross multiply
    153,991.26x = 212,509.56 × 90,330.12
  4. Step 4: Simplify right side
    153,991.26x = 19,196,014,055.95
  5. Step 5: Solve for x
    x = 19,196,014,055.95/153,991.26
  6. Step 6: Final answer
    x = 124,656.52

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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.