Home / 79,979.28-120,041.63-42,570.65

Finding the Fourth Proportional to 79,979.28, 120,041.63 and 42,570.65

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Solution

The fourth proportional to 79,979.28, 120,041.63 and 42,570.65 is: 63,894.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,979.28 : 120,041.63 = 42,570.65 : x
  2. Step 2: Convert to fraction form
    79,979.28/120,041.63 = 42,570.65/x
  3. Step 3: Cross multiply
    79,979.28x = 120,041.63 × 42,570.65
  4. Step 4: Simplify right side
    79,979.28x = 5,110,249,403.10
  5. Step 5: Solve for x
    x = 5,110,249,403.10/79,979.28
  6. Step 6: Final answer
    x = 63,894.67

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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.