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Finding the Fourth Proportional to 61,306.89, 91,911.47 and 56,386.41

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Solution

The fourth proportional to 61,306.89, 91,911.47 and 56,386.41 is: 84,534.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,306.89 : 91,911.47 = 56,386.41 : x
  2. Step 2: Convert to fraction form
    61,306.89/91,911.47 = 56,386.41/x
  3. Step 3: Cross multiply
    61,306.89x = 91,911.47 × 56,386.41
  4. Step 4: Simplify right side
    61,306.89x = 5,182,557,549.19
  5. Step 5: Solve for x
    x = 5,182,557,549.19/61,306.89
  6. Step 6: Final answer
    x = 84,534.67

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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.