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Finding the Fourth Proportional to 72,447.90, 101,219.70 and 72,447.90

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Solution

The fourth proportional to 72,447.90, 101,219.70 and 72,447.90 is: 101,219.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,447.90 : 101,219.70 = 72,447.90 : x
  2. Step 2: Convert to fraction form
    72,447.90/101,219.70 = 72,447.90/x
  3. Step 3: Cross multiply
    72,447.90x = 101,219.70 × 72,447.90
  4. Step 4: Simplify right side
    72,447.90x = 7,333,154,703.63
  5. Step 5: Solve for x
    x = 7,333,154,703.63/72,447.90
  6. Step 6: Final answer
    x = 101,219.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.