Home / 76,428.32-105,474.36-42,436.80

Finding the Fourth Proportional to 76,428.32, 105,474.36 and 42,436.80

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Solution

The fourth proportional to 76,428.32, 105,474.36 and 42,436.80 is: 58,564.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,428.32 : 105,474.36 = 42,436.80 : x
  2. Step 2: Convert to fraction form
    76,428.32/105,474.36 = 42,436.80/x
  3. Step 3: Cross multiply
    76,428.32x = 105,474.36 × 42,436.80
  4. Step 4: Simplify right side
    76,428.32x = 4,475,994,320.45
  5. Step 5: Solve for x
    x = 4,475,994,320.45/76,428.32
  6. Step 6: Final answer
    x = 58,564.60

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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.