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Finding the Fourth Proportional to 93,128.40, 139,838.40 and 63,676.80

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Solution

The fourth proportional to 93,128.40, 139,838.40 and 63,676.80 is: 95,614.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,128.40 : 139,838.40 = 63,676.80 : x
  2. Step 2: Convert to fraction form
    93,128.40/139,838.40 = 63,676.80/x
  3. Step 3: Cross multiply
    93,128.40x = 139,838.40 × 63,676.80
  4. Step 4: Simplify right side
    93,128.40x = 8,904,461,829.12
  5. Step 5: Solve for x
    x = 8,904,461,829.12/93,128.40
  6. Step 6: Final answer
    x = 95,614.89

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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.