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Finding the Fourth Proportional to 93,117, 128,479.05 and 54,878.07

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Solution

The fourth proportional to 93,117, 128,479.05 and 54,878.07 is: 75,718.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,117 : 128,479.05 = 54,878.07 : x
  2. Step 2: Convert to fraction form
    93,117/128,479.05 = 54,878.07/x
  3. Step 3: Cross multiply
    93,117x = 128,479.05 × 54,878.07
  4. Step 4: Simplify right side
    93,117x = 7,050,682,299.43
  5. Step 5: Solve for x
    x = 7,050,682,299.43/93,117
  6. Step 6: Final answer
    x = 75,718.53

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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.