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Finding the Fourth Proportional to 93,142.64, 139,678.70 and 39,832.40

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Solution

The fourth proportional to 93,142.64, 139,678.70 and 39,832.40 is: 59,733.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,142.64 : 139,678.70 = 39,832.40 : x
  2. Step 2: Convert to fraction form
    93,142.64/139,678.70 = 39,832.40/x
  3. Step 3: Cross multiply
    93,142.64x = 139,678.70 × 39,832.40
  4. Step 4: Simplify right side
    93,142.64x = 5,563,736,952.32
  5. Step 5: Solve for x
    x = 5,563,736,952.32/93,142.64
  6. Step 6: Final answer
    x = 59,733.51

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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.