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Finding the Fourth Proportional to 78,610.95, 108,483.53 and 42,800.85

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Solution

The fourth proportional to 78,610.95, 108,483.53 and 42,800.85 is: 59,065.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,610.95 : 108,483.53 = 42,800.85 : x
  2. Step 2: Convert to fraction form
    78,610.95/108,483.53 = 42,800.85/x
  3. Step 3: Cross multiply
    78,610.95x = 108,483.53 × 42,800.85
  4. Step 4: Simplify right side
    78,610.95x = 4,643,187,081.00
  5. Step 5: Solve for x
    x = 4,643,187,081.00/78,610.95
  6. Step 6: Final answer
    x = 59,065.40

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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.