Home / 156,900.86-216,521.89-85,280.66

Finding the Fourth Proportional to 156,900.86, 216,521.89 and 85,280.66

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Solution

The fourth proportional to 156,900.86, 216,521.89 and 85,280.66 is: 117,686.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,900.86 : 216,521.89 = 85,280.66 : x
  2. Step 2: Convert to fraction form
    156,900.86/216,521.89 = 85,280.66/x
  3. Step 3: Cross multiply
    156,900.86x = 216,521.89 × 85,280.66
  4. Step 4: Simplify right side
    156,900.86x = 18,465,129,199.79
  5. Step 5: Solve for x
    x = 18,465,129,199.79/156,900.86
  6. Step 6: Final answer
    x = 117,686.60

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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.