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Finding the Fourth Proportional to 156,498.68, 215,968.28 and 84,878.68

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Solution

The fourth proportional to 156,498.68, 215,968.28 and 84,878.68 is: 117,132.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,498.68 : 215,968.28 = 84,878.68 : x
  2. Step 2: Convert to fraction form
    156,498.68/215,968.28 = 84,878.68/x
  3. Step 3: Cross multiply
    156,498.68x = 215,968.28 × 84,878.68
  4. Step 4: Simplify right side
    156,498.68x = 18,331,102,528.27
  5. Step 5: Solve for x
    x = 18,331,102,528.27/156,498.68
  6. Step 6: Final answer
    x = 117,132.63

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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.