Home / 76,881.02-115,312.95-20,726.72

Finding the Fourth Proportional to 76,881.02, 115,312.95 and 20,726.72

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Solution

The fourth proportional to 76,881.02, 115,312.95 and 20,726.72 is: 31,087.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,881.02 : 115,312.95 = 20,726.72 : x
  2. Step 2: Convert to fraction form
    76,881.02/115,312.95 = 20,726.72/x
  3. Step 3: Cross multiply
    76,881.02x = 115,312.95 × 20,726.72
  4. Step 4: Simplify right side
    76,881.02x = 2,390,059,227.02
  5. Step 5: Solve for x
    x = 2,390,059,227.02/76,881.02
  6. Step 6: Final answer
    x = 31,087.77

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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.