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Finding the Fourth Proportional to 64,655.03, 89,280 and 47,688.68

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Solution

The fourth proportional to 64,655.03, 89,280 and 47,688.68 is: 65,851.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,655.03 : 89,280 = 47,688.68 : x
  2. Step 2: Convert to fraction form
    64,655.03/89,280 = 47,688.68/x
  3. Step 3: Cross multiply
    64,655.03x = 89,280 × 47,688.68
  4. Step 4: Simplify right side
    64,655.03x = 4,257,644,904.00
  5. Step 5: Solve for x
    x = 4,257,644,904.00/64,655.03
  6. Step 6: Final answer
    x = 65,851.72

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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.