Home / 78,813.14-108,661.08-57,285.20

Finding the Fourth Proportional to 78,813.14, 108,661.08 and 57,285.20

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Solution

The fourth proportional to 78,813.14, 108,661.08 and 57,285.20 is: 78,980.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,813.14 : 108,661.08 = 57,285.20 : x
  2. Step 2: Convert to fraction form
    78,813.14/108,661.08 = 57,285.20/x
  3. Step 3: Cross multiply
    78,813.14x = 108,661.08 × 57,285.20
  4. Step 4: Simplify right side
    78,813.14x = 6,224,671,700.02
  5. Step 5: Solve for x
    x = 6,224,671,700.02/78,813.14
  6. Step 6: Final answer
    x = 78,980.13

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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.