Home / 156,278.63-234,543.63-81,421.13

Finding the Fourth Proportional to 156,278.63, 234,543.63 and 81,421.13

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Solution

The fourth proportional to 156,278.63, 234,543.63 and 81,421.13 is: 122,197.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,278.63 : 234,543.63 = 81,421.13 : x
  2. Step 2: Convert to fraction form
    156,278.63/234,543.63 = 81,421.13/x
  3. Step 3: Cross multiply
    156,278.63x = 234,543.63 × 81,421.13
  4. Step 4: Simplify right side
    156,278.63x = 19,096,806,216.18
  5. Step 5: Solve for x
    x = 19,096,806,216.18/156,278.63
  6. Step 6: Final answer
    x = 122,197.17

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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.