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Finding the Fourth Proportional to 157,985.64, 216,859.68 and 139,679.64

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Solution

The fourth proportional to 157,985.64, 216,859.68 and 139,679.64 is: 191,731.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,985.64 : 216,859.68 = 139,679.64 : x
  2. Step 2: Convert to fraction form
    157,985.64/216,859.68 = 139,679.64/x
  3. Step 3: Cross multiply
    157,985.64x = 216,859.68 × 139,679.64
  4. Step 4: Simplify right side
    157,985.64x = 30,290,882,032.92
  5. Step 5: Solve for x
    x = 30,290,882,032.92/157,985.64
  6. Step 6: Final answer
    x = 191,731.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.