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Finding the Fourth Proportional to 93,281.79, 128,598.43 and 78,883.77

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Solution

The fourth proportional to 93,281.79, 128,598.43 and 78,883.77 is: 108,749.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,281.79 : 128,598.43 = 78,883.77 : x
  2. Step 2: Convert to fraction form
    93,281.79/128,598.43 = 78,883.77/x
  3. Step 3: Cross multiply
    93,281.79x = 128,598.43 × 78,883.77
  4. Step 4: Simplify right side
    93,281.79x = 10,144,328,580.06
  5. Step 5: Solve for x
    x = 10,144,328,580.06/93,281.79
  6. Step 6: Final answer
    x = 108,749.29

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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.