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Finding the Fourth Proportional to 145,543.60, 200,835.88 and 81,880.03

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Solution

The fourth proportional to 145,543.60, 200,835.88 and 81,880.03 is: 112,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,543.60 : 200,835.88 = 81,880.03 : x
  2. Step 2: Convert to fraction form
    145,543.60/200,835.88 = 81,880.03/x
  3. Step 3: Cross multiply
    145,543.60x = 200,835.88 × 81,880.03
  4. Step 4: Simplify right side
    145,543.60x = 16,444,447,879.48
  5. Step 5: Solve for x
    x = 16,444,447,879.48/145,543.60
  6. Step 6: Final answer
    x = 112,986.40

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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.