Home / 156,639.99-216,157.40-85,018.47

Finding the Fourth Proportional to 156,639.99, 216,157.40 and 85,018.47

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Solution

The fourth proportional to 156,639.99, 216,157.40 and 85,018.47 is: 117,322.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,639.99 : 216,157.40 = 85,018.47 : x
  2. Step 2: Convert to fraction form
    156,639.99/216,157.40 = 85,018.47/x
  3. Step 3: Cross multiply
    156,639.99x = 216,157.40 × 85,018.47
  4. Step 4: Simplify right side
    156,639.99x = 18,377,371,910.61
  5. Step 5: Solve for x
    x = 18,377,371,910.61/156,639.99
  6. Step 6: Final answer
    x = 117,322.35

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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.