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Finding the Fourth Proportional to 61,320, 92,389.75 and 55,403.76

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Solution

The fourth proportional to 61,320, 92,389.75 and 55,403.76 is: 83,475.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,320 : 92,389.75 = 55,403.76 : x
  2. Step 2: Convert to fraction form
    61,320/92,389.75 = 55,403.76/x
  3. Step 3: Cross multiply
    61,320x = 92,389.75 × 55,403.76
  4. Step 4: Simplify right side
    61,320x = 5,118,739,535.46
  5. Step 5: Solve for x
    x = 5,118,739,535.46/61,320
  6. Step 6: Final answer
    x = 83,475.86

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.