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Finding the Fourth Proportional to 93,320.16, 128,749.68 and 65,015.52

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Solution

The fourth proportional to 93,320.16, 128,749.68 and 65,015.52 is: 89,699.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,320.16 : 128,749.68 = 65,015.52 : x
  2. Step 2: Convert to fraction form
    93,320.16/128,749.68 = 65,015.52/x
  3. Step 3: Cross multiply
    93,320.16x = 128,749.68 × 65,015.52
  4. Step 4: Simplify right side
    93,320.16x = 8,370,727,395.03
  5. Step 5: Solve for x
    x = 8,370,727,395.03/93,320.16
  6. Step 6: Final answer
    x = 89,699.03

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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.