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Finding the Fourth Proportional to 93,345.36, 128,820 and 53,065.92

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Solution

The fourth proportional to 93,345.36, 128,820 and 53,065.92 is: 73,232.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,345.36 : 128,820 = 53,065.92 : x
  2. Step 2: Convert to fraction form
    93,345.36/128,820 = 53,065.92/x
  3. Step 3: Cross multiply
    93,345.36x = 128,820 × 53,065.92
  4. Step 4: Simplify right side
    93,345.36x = 6,835,951,814.40
  5. Step 5: Solve for x
    x = 6,835,951,814.40/93,345.36
  6. Step 6: Final answer
    x = 73,232.90

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1.5x scale

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.