Home / 78,088.94-117,155.28-31,374.62

Finding the Fourth Proportional to 78,088.94, 117,155.28 and 31,374.62

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Solution

The fourth proportional to 78,088.94, 117,155.28 and 31,374.62 is: 47,070.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,088.94 : 117,155.28 = 31,374.62 : x
  2. Step 2: Convert to fraction form
    78,088.94/117,155.28 = 31,374.62/x
  3. Step 3: Cross multiply
    78,088.94x = 117,155.28 × 31,374.62
  4. Step 4: Simplify right side
    78,088.94x = 3,675,702,390.99
  5. Step 5: Solve for x
    x = 3,675,702,390.99/78,088.94
  6. Step 6: Final answer
    x = 47,070.72

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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.