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Finding the Fourth Proportional to 153,867.51, 212,335.56 and 90,193.01

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Solution

The fourth proportional to 153,867.51, 212,335.56 and 90,193.01 is: 124,465.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,867.51 : 212,335.56 = 90,193.01 : x
  2. Step 2: Convert to fraction form
    153,867.51/212,335.56 = 90,193.01/x
  3. Step 3: Cross multiply
    153,867.51x = 212,335.56 × 90,193.01
  4. Step 4: Simplify right side
    153,867.51x = 19,151,182,224.76
  5. Step 5: Solve for x
    x = 19,151,182,224.76/153,867.51
  6. Step 6: Final answer
    x = 124,465.41

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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.