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Finding the Fourth Proportional to 93,279.66, 128,729.40 and 53,000.25

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Solution

The fourth proportional to 93,279.66, 128,729.40 and 53,000.25 is: 73,142.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,279.66 : 128,729.40 = 53,000.25 : x
  2. Step 2: Convert to fraction form
    93,279.66/128,729.40 = 53,000.25/x
  3. Step 3: Cross multiply
    93,279.66x = 128,729.40 × 53,000.25
  4. Step 4: Simplify right side
    93,279.66x = 6,822,689,700.86
  5. Step 5: Solve for x
    x = 6,822,689,700.86/93,279.66
  6. Step 6: Final answer
    x = 73,142.31

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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.