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Finding the Fourth Proportional to 78,718.93, 117,576.71 and 71,210.94

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Solution

The fourth proportional to 78,718.93, 117,576.71 and 71,210.94 is: 106,362.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,718.93 : 117,576.71 = 71,210.94 : x
  2. Step 2: Convert to fraction form
    78,718.93/117,576.71 = 71,210.94/x
  3. Step 3: Cross multiply
    78,718.93x = 117,576.71 × 71,210.94
  4. Step 4: Simplify right side
    78,718.93x = 8,372,748,039.91
  5. Step 5: Solve for x
    x = 8,372,748,039.91/78,718.93
  6. Step 6: Final answer
    x = 106,362.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.