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Finding the Fourth Proportional to 72,026.40, 107,947.80 and 40,436.40

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Solution

The fourth proportional to 72,026.40, 107,947.80 and 40,436.40 is: 60,603.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,026.40 : 107,947.80 = 40,436.40 : x
  2. Step 2: Convert to fraction form
    72,026.40/107,947.80 = 40,436.40/x
  3. Step 3: Cross multiply
    72,026.40x = 107,947.80 × 40,436.40
  4. Step 4: Simplify right side
    72,026.40x = 4,365,020,419.92
  5. Step 5: Solve for x
    x = 4,365,020,419.92/72,026.40
  6. Step 6: Final answer
    x = 60,603.06

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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.