Home / 78,877.31-108,855.10-43,070.65

Finding the Fourth Proportional to 78,877.31, 108,855.10 and 43,070.65

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Solution

The fourth proportional to 78,877.31, 108,855.10 and 43,070.65 is: 59,439.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,877.31 : 108,855.10 = 43,070.65 : x
  2. Step 2: Convert to fraction form
    78,877.31/108,855.10 = 43,070.65/x
  3. Step 3: Cross multiply
    78,877.31x = 108,855.10 × 43,070.65
  4. Step 4: Simplify right side
    78,877.31x = 4,688,459,805.14
  5. Step 5: Solve for x
    x = 4,688,459,805.14/78,877.31
  6. Step 6: Final answer
    x = 59,439.91

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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.