Home / 78,621.54-108,500.40-42,812.16

Finding the Fourth Proportional to 78,621.54, 108,500.40 and 42,812.16

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Solution

The fourth proportional to 78,621.54, 108,500.40 and 42,812.16 is: 59,082.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,621.54 : 108,500.40 = 42,812.16 : x
  2. Step 2: Convert to fraction form
    78,621.54/108,500.40 = 42,812.16/x
  3. Step 3: Cross multiply
    78,621.54x = 108,500.40 × 42,812.16
  4. Step 4: Simplify right side
    78,621.54x = 4,645,136,484.86
  5. Step 5: Solve for x
    x = 4,645,136,484.86/78,621.54
  6. Step 6: Final answer
    x = 59,082.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.