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Finding the Fourth Proportional to 70,947.02, 97,805.16 and 55,813.40

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Solution

The fourth proportional to 70,947.02, 97,805.16 and 55,813.40 is: 76,942.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,947.02 : 97,805.16 = 55,813.40 : x
  2. Step 2: Convert to fraction form
    70,947.02/97,805.16 = 55,813.40/x
  3. Step 3: Cross multiply
    70,947.02x = 97,805.16 × 55,813.40
  4. Step 4: Simplify right side
    70,947.02x = 5,458,838,394.89
  5. Step 5: Solve for x
    x = 5,458,838,394.89/70,947.02
  6. Step 6: Final answer
    x = 76,942.46

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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.