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Finding the Fourth Proportional to 91,272, 125,955.36 and 51,528

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Solution

The fourth proportional to 91,272, 125,955.36 and 51,528 is: 71,108.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,272 : 125,955.36 = 51,528 : x
  2. Step 2: Convert to fraction form
    91,272/125,955.36 = 51,528/x
  3. Step 3: Cross multiply
    91,272x = 125,955.36 × 51,528
  4. Step 4: Simplify right side
    91,272x = 6,490,227,790.08
  5. Step 5: Solve for x
    x = 6,490,227,790.08/91,272
  6. Step 6: Final answer
    x = 71,108.64

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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.