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Finding the Fourth Proportional to 78,445.92, 117,718.92 and 28,521.23

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Solution

The fourth proportional to 78,445.92, 117,718.92 and 28,521.23 is: 42,800.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,445.92 : 117,718.92 = 28,521.23 : x
  2. Step 2: Convert to fraction form
    78,445.92/117,718.92 = 28,521.23/x
  3. Step 3: Cross multiply
    78,445.92x = 117,718.92 × 28,521.23
  4. Step 4: Simplify right side
    78,445.92x = 3,357,487,804.08
  5. Step 5: Solve for x
    x = 3,357,487,804.08/78,445.92
  6. Step 6: Final answer
    x = 42,800.03

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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.