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Finding the Fourth Proportional to 64,985.76, 89,680.37 and 35,177.76

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Solution

The fourth proportional to 64,985.76, 89,680.37 and 35,177.76 is: 48,545.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,985.76 : 89,680.37 = 35,177.76 : x
  2. Step 2: Convert to fraction form
    64,985.76/89,680.37 = 35,177.76/x
  3. Step 3: Cross multiply
    64,985.76x = 89,680.37 × 35,177.76
  4. Step 4: Simplify right side
    64,985.76x = 3,154,754,356.68
  5. Step 5: Solve for x
    x = 3,154,754,356.68/64,985.76
  6. Step 6: Final answer
    x = 48,545.32

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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.