Home / 156,985.20-216,638.04-85,365.72

Finding the Fourth Proportional to 156,985.20, 216,638.04 and 85,365.72

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Solution

The fourth proportional to 156,985.20, 216,638.04 and 85,365.72 is: 117,803.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,985.20 : 216,638.04 = 85,365.72 : x
  2. Step 2: Convert to fraction form
    156,985.20/216,638.04 = 85,365.72/x
  3. Step 3: Cross multiply
    156,985.20x = 216,638.04 × 85,365.72
  4. Step 4: Simplify right side
    156,985.20x = 18,493,462,263.99
  5. Step 5: Solve for x
    x = 18,493,462,263.99/156,985.20
  6. Step 6: Final answer
    x = 117,803.86

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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.