Home / 78,631.48-108,510.80-42,821.44

Finding the Fourth Proportional to 78,631.48, 108,510.80 and 42,821.44

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Solution

The fourth proportional to 78,631.48, 108,510.80 and 42,821.44 is: 59,093.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,631.48 : 108,510.80 = 42,821.44 : x
  2. Step 2: Convert to fraction form
    78,631.48/108,510.80 = 42,821.44/x
  3. Step 3: Cross multiply
    78,631.48x = 108,510.80 × 42,821.44
  4. Step 4: Simplify right side
    78,631.48x = 4,646,588,711.55
  5. Step 5: Solve for x
    x = 4,646,588,711.55/78,631.48
  6. Step 6: Final answer
    x = 59,093.24

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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.