Home / 78,631.07-108,461.88-47,990.16

Finding the Fourth Proportional to 78,631.07, 108,461.88 and 47,990.16

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Solution

The fourth proportional to 78,631.07, 108,461.88 and 47,990.16 is: 66,196.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,631.07 : 108,461.88 = 47,990.16 : x
  2. Step 2: Convert to fraction form
    78,631.07/108,461.88 = 47,990.16/x
  3. Step 3: Cross multiply
    78,631.07x = 108,461.88 × 47,990.16
  4. Step 4: Simplify right side
    78,631.07x = 5,205,102,975.10
  5. Step 5: Solve for x
    x = 5,205,102,975.10/78,631.07
  6. Step 6: Final answer
    x = 66,196.52

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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.