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Finding the Fourth Proportional to 93,007.80, 139,857.30 and 77,801.40

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Solution

The fourth proportional to 93,007.80, 139,857.30 and 77,801.40 is: 116,991.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,007.80 : 139,857.30 = 77,801.40 : x
  2. Step 2: Convert to fraction form
    93,007.80/139,857.30 = 77,801.40/x
  3. Step 3: Cross multiply
    93,007.80x = 139,857.30 × 77,801.40
  4. Step 4: Simplify right side
    93,007.80x = 10,881,093,740.22
  5. Step 5: Solve for x
    x = 10,881,093,740.22/93,007.80
  6. Step 6: Final answer
    x = 116,991.20

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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.