Home / 78,748.47-118,088.07-28,815.60

Finding the Fourth Proportional to 78,748.47, 118,088.07 and 28,815.60

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Solution

The fourth proportional to 78,748.47, 118,088.07 and 28,815.60 is: 43,210.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,748.47 : 118,088.07 = 28,815.60 : x
  2. Step 2: Convert to fraction form
    78,748.47/118,088.07 = 28,815.60/x
  3. Step 3: Cross multiply
    78,748.47x = 118,088.07 × 28,815.60
  4. Step 4: Simplify right side
    78,748.47x = 3,402,778,589.89
  5. Step 5: Solve for x
    x = 3,402,778,589.89/78,748.47
  6. Step 6: Final answer
    x = 43,210.73

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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.