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Finding the Fourth Proportional to 56,276, 77,663.32 and 31,125.52

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Solution

The fourth proportional to 56,276, 77,663.32 and 31,125.52 is: 42,954.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,276 : 77,663.32 = 31,125.52 : x
  2. Step 2: Convert to fraction form
    56,276/77,663.32 = 31,125.52/x
  3. Step 3: Cross multiply
    56,276x = 77,663.32 × 31,125.52
  4. Step 4: Simplify right side
    56,276x = 2,417,311,219.93
  5. Step 5: Solve for x
    x = 2,417,311,219.93/56,276
  6. Step 6: Final answer
    x = 42,954.57

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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.