Home / 42,678.19-64,030.10-20,206

Finding the Fourth Proportional to 42,678.19, 64,030.10 and 20,206

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Solution

The fourth proportional to 42,678.19, 64,030.10 and 20,206 is: 30,315.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,678.19 : 64,030.10 = 20,206 : x
  2. Step 2: Convert to fraction form
    42,678.19/64,030.10 = 20,206/x
  3. Step 3: Cross multiply
    42,678.19x = 64,030.10 × 20,206
  4. Step 4: Simplify right side
    42,678.19x = 1,293,792,200.60
  5. Step 5: Solve for x
    x = 1,293,792,200.60/42,678.19
  6. Step 6: Final answer
    x = 30,315.07

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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.