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Finding the Fourth Proportional to 72,421.90, 97,458.52 and 72,421.90

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Solution

The fourth proportional to 72,421.90, 97,458.52 and 72,421.90 is: 97,458.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,421.90 : 97,458.52 = 72,421.90 : x
  2. Step 2: Convert to fraction form
    72,421.90/97,458.52 = 72,421.90/x
  3. Step 3: Cross multiply
    72,421.90x = 97,458.52 × 72,421.90
  4. Step 4: Simplify right side
    72,421.90x = 7,058,131,189.59
  5. Step 5: Solve for x
    x = 7,058,131,189.59/72,421.90
  6. Step 6: Final answer
    x = 97,458.52

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.