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Finding the Fourth Proportional to 93,279.80, 128,729.60 and 53,000.38

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Solution

The fourth proportional to 93,279.80, 128,729.60 and 53,000.38 is: 73,142.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,279.80 : 128,729.60 = 53,000.38 : x
  2. Step 2: Convert to fraction form
    93,279.80/128,729.60 = 53,000.38/x
  3. Step 3: Cross multiply
    93,279.80x = 128,729.60 × 53,000.38
  4. Step 4: Simplify right side
    93,279.80x = 6,822,717,662.85
  5. Step 5: Solve for x
    x = 6,822,717,662.85/93,279.80
  6. Step 6: Final answer
    x = 73,142.50

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1.5x scale

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.