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Finding the Fourth Proportional to 63,420.78, 87,579.51 and 47,477.55

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Solution

The fourth proportional to 63,420.78, 87,579.51 and 47,477.55 is: 65,563.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,420.78 : 87,579.51 = 47,477.55 : x
  2. Step 2: Convert to fraction form
    63,420.78/87,579.51 = 47,477.55/x
  3. Step 3: Cross multiply
    63,420.78x = 87,579.51 × 47,477.55
  4. Step 4: Simplify right side
    63,420.78x = 4,158,061,071.46
  5. Step 5: Solve for x
    x = 4,158,061,071.46/63,420.78
  6. Step 6: Final answer
    x = 65,563.07

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1.5x scale

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.