Home / 78,913.18-118,421.56-28,993.69

Finding the Fourth Proportional to 78,913.18, 118,421.56 and 28,993.69

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Solution

The fourth proportional to 78,913.18, 118,421.56 and 28,993.69 is: 43,509.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,913.18 : 118,421.56 = 28,993.69 : x
  2. Step 2: Convert to fraction form
    78,913.18/118,421.56 = 28,993.69/x
  3. Step 3: Cross multiply
    78,913.18x = 118,421.56 × 28,993.69
  4. Step 4: Simplify right side
    78,913.18x = 3,433,478,184.23
  5. Step 5: Solve for x
    x = 3,433,478,184.23/78,913.18
  6. Step 6: Final answer
    x = 43,509.56

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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.