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Finding the Fourth Proportional to 93,319.80, 139,979.70 and 57,809.40

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Solution

The fourth proportional to 93,319.80, 139,979.70 and 57,809.40 is: 86,714.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,319.80 : 139,979.70 = 57,809.40 : x
  2. Step 2: Convert to fraction form
    93,319.80/139,979.70 = 57,809.40/x
  3. Step 3: Cross multiply
    93,319.80x = 139,979.70 × 57,809.40
  4. Step 4: Simplify right side
    93,319.80x = 8,092,142,469.18
  5. Step 5: Solve for x
    x = 8,092,142,469.18/93,319.80
  6. Step 6: Final answer
    x = 86,714.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.