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Finding the Fourth Proportional to 58,985.60, 81,503.72 and 47,146.64

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Solution

The fourth proportional to 58,985.60, 81,503.72 and 47,146.64 is: 65,145.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,985.60 : 81,503.72 = 47,146.64 : x
  2. Step 2: Convert to fraction form
    58,985.60/81,503.72 = 47,146.64/x
  3. Step 3: Cross multiply
    58,985.60x = 81,503.72 × 47,146.64
  4. Step 4: Simplify right side
    58,985.60x = 3,842,626,545.50
  5. Step 5: Solve for x
    x = 3,842,626,545.50/58,985.60
  6. Step 6: Final answer
    x = 65,145.16

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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.