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Finding the Fourth Proportional to 153,943.64, 212,477.64 and 90,301.94

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Solution

The fourth proportional to 153,943.64, 212,477.64 and 90,301.94 is: 124,637.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,943.64 : 212,477.64 = 90,301.94 : x
  2. Step 2: Convert to fraction form
    153,943.64/212,477.64 = 90,301.94/x
  3. Step 3: Cross multiply
    153,943.64x = 212,477.64 × 90,301.94
  4. Step 4: Simplify right side
    153,943.64x = 19,187,143,098.62
  5. Step 5: Solve for x
    x = 19,187,143,098.62/153,943.64
  6. Step 6: Final answer
    x = 124,637.45

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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.