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Finding the Fourth Proportional to 61,149.76, 91,569.12 and 56,017.60

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Solution

The fourth proportional to 61,149.76, 91,569.12 and 56,017.60 is: 83,883.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,149.76 : 91,569.12 = 56,017.60 : x
  2. Step 2: Convert to fraction form
    61,149.76/91,569.12 = 56,017.60/x
  3. Step 3: Cross multiply
    61,149.76x = 91,569.12 × 56,017.60
  4. Step 4: Simplify right side
    61,149.76x = 5,129,482,336.51
  5. Step 5: Solve for x
    x = 5,129,482,336.51/61,149.76
  6. Step 6: Final answer
    x = 83,883.93

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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.