Home / 76,150.47-105,143.09-61,125.78

Finding the Fourth Proportional to 76,150.47, 105,143.09 and 61,125.78

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Solution

The fourth proportional to 76,150.47, 105,143.09 and 61,125.78 is: 84,398.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,150.47 : 105,143.09 = 61,125.78 : x
  2. Step 2: Convert to fraction form
    76,150.47/105,143.09 = 61,125.78/x
  3. Step 3: Cross multiply
    76,150.47x = 105,143.09 × 61,125.78
  4. Step 4: Simplify right side
    76,150.47x = 6,426,953,082.23
  5. Step 5: Solve for x
    x = 6,426,953,082.23/76,150.47
  6. Step 6: Final answer
    x = 84,398.08

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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.