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Finding the Fourth Proportional to 97,655.40, 146,796.30 and 90,721.80

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Solution

The fourth proportional to 97,655.40, 146,796.30 and 90,721.80 is: 136,373.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,655.40 : 146,796.30 = 90,721.80 : x
  2. Step 2: Convert to fraction form
    97,655.40/146,796.30 = 90,721.80/x
  3. Step 3: Cross multiply
    97,655.40x = 146,796.30 × 90,721.80
  4. Step 4: Simplify right side
    97,655.40x = 13,317,624,569.34
  5. Step 5: Solve for x
    x = 13,317,624,569.34/97,655.40
  6. Step 6: Final answer
    x = 136,373.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.