Home / 102,878.12-154,316.08-78,070.52

Finding the Fourth Proportional to 102,878.12, 154,316.08 and 78,070.52

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Solution

The fourth proportional to 102,878.12, 154,316.08 and 78,070.52 is: 117,104.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,878.12 : 154,316.08 = 78,070.52 : x
  2. Step 2: Convert to fraction form
    102,878.12/154,316.08 = 78,070.52/x
  3. Step 3: Cross multiply
    102,878.12x = 154,316.08 × 78,070.52
  4. Step 4: Simplify right side
    102,878.12x = 12,047,536,609.96
  5. Step 5: Solve for x
    x = 12,047,536,609.96/102,878.12
  6. Step 6: Final answer
    x = 117,104.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.