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Finding the Fourth Proportional to 153,989.51, 212,507.15 and 90,328.37

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Solution

The fourth proportional to 153,989.51, 212,507.15 and 90,328.37 is: 124,654.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,989.51 : 212,507.15 = 90,328.37 : x
  2. Step 2: Convert to fraction form
    153,989.51/212,507.15 = 90,328.37/x
  3. Step 3: Cross multiply
    153,989.51x = 212,507.15 × 90,328.37
  4. Step 4: Simplify right side
    153,989.51x = 19,195,422,958.67
  5. Step 5: Solve for x
    x = 19,195,422,958.67/153,989.51
  6. Step 6: Final answer
    x = 124,654.10

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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.