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Finding the Fourth Proportional to 163,856.02, 245,714.46 and 69,128.68

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Solution

The fourth proportional to 163,856.02, 245,714.46 and 69,128.68 is: 103,663.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,856.02 : 245,714.46 = 69,128.68 : x
  2. Step 2: Convert to fraction form
    163,856.02/245,714.46 = 69,128.68/x
  3. Step 3: Cross multiply
    163,856.02x = 245,714.46 × 69,128.68
  4. Step 4: Simplify right side
    163,856.02x = 16,985,916,276.71
  5. Step 5: Solve for x
    x = 16,985,916,276.71/163,856.02
  6. Step 6: Final answer
    x = 103,663.67

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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.