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Finding the Fourth Proportional to 72,622.99, 99,988.03 and 61,264.26

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Solution

The fourth proportional to 72,622.99, 99,988.03 and 61,264.26 is: 84,349.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,622.99 : 99,988.03 = 61,264.26 : x
  2. Step 2: Convert to fraction form
    72,622.99/99,988.03 = 61,264.26/x
  3. Step 3: Cross multiply
    72,622.99x = 99,988.03 × 61,264.26
  4. Step 4: Simplify right side
    72,622.99x = 6,125,692,166.87
  5. Step 5: Solve for x
    x = 6,125,692,166.87/72,622.99
  6. Step 6: Final answer
    x = 84,349.22

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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.