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Finding the Fourth Proportional to 108,920.80, 163,316.40 and 56,432.80

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Solution

The fourth proportional to 108,920.80, 163,316.40 and 56,432.80 is: 84,615.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,920.80 : 163,316.40 = 56,432.80 : x
  2. Step 2: Convert to fraction form
    108,920.80/163,316.40 = 56,432.80/x
  3. Step 3: Cross multiply
    108,920.80x = 163,316.40 × 56,432.80
  4. Step 4: Simplify right side
    108,920.80x = 9,216,401,737.92
  5. Step 5: Solve for x
    x = 9,216,401,737.92/108,920.80
  6. Step 6: Final answer
    x = 84,615.63

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1.5x scale

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.