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Finding the Fourth Proportional to 61,390.79, 84,718.43 and 34,533.30

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Solution

The fourth proportional to 61,390.79, 84,718.43 and 34,533.30 is: 47,655.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,390.79 : 84,718.43 = 34,533.30 : x
  2. Step 2: Convert to fraction form
    61,390.79/84,718.43 = 34,533.30/x
  3. Step 3: Cross multiply
    61,390.79x = 84,718.43 × 34,533.30
  4. Step 4: Simplify right side
    61,390.79x = 2,925,606,786.05
  5. Step 5: Solve for x
    x = 2,925,606,786.05/61,390.79
  6. Step 6: Final answer
    x = 47,655.47

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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.