Home / 76,399.84-105,430.12-42,406.32

Finding the Fourth Proportional to 76,399.84, 105,430.12 and 42,406.32

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Solution

The fourth proportional to 76,399.84, 105,430.12 and 42,406.32 is: 58,519.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,399.84 : 105,430.12 = 42,406.32 : x
  2. Step 2: Convert to fraction form
    76,399.84/105,430.12 = 42,406.32/x
  3. Step 3: Cross multiply
    76,399.84x = 105,430.12 × 42,406.32
  4. Step 4: Simplify right side
    76,399.84x = 4,470,903,406.36
  5. Step 5: Solve for x
    x = 4,470,903,406.36/76,399.84
  6. Step 6: Final answer
    x = 58,519.80

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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.