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Finding the Fourth Proportional to 68,947.70, 103,421.55 and 65,740.10

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Solution

The fourth proportional to 68,947.70, 103,421.55 and 65,740.10 is: 98,610.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,947.70 : 103,421.55 = 65,740.10 : x
  2. Step 2: Convert to fraction form
    68,947.70/103,421.55 = 65,740.10/x
  3. Step 3: Cross multiply
    68,947.70x = 103,421.55 × 65,740.10
  4. Step 4: Simplify right side
    68,947.70x = 6,798,943,039.16
  5. Step 5: Solve for x
    x = 6,798,943,039.16/68,947.70
  6. Step 6: Final answer
    x = 98,610.15

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1.5x scale

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.