Home / 78,980.08-118,490.89-28,384.21

Finding the Fourth Proportional to 78,980.08, 118,490.89 and 28,384.21

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Solution

The fourth proportional to 78,980.08, 118,490.89 and 28,384.21 is: 42,583.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,980.08 : 118,490.89 = 28,384.21 : x
  2. Step 2: Convert to fraction form
    78,980.08/118,490.89 = 28,384.21/x
  3. Step 3: Cross multiply
    78,980.08x = 118,490.89 × 28,384.21
  4. Step 4: Simplify right side
    78,980.08x = 3,363,270,304.85
  5. Step 5: Solve for x
    x = 3,363,270,304.85/78,980.08
  6. Step 6: Final answer
    x = 42,583.78

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1.5x scale

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.