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Finding the Fourth Proportional to 61,931.94, 85,501.50 and 40,772.70

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Solution

The fourth proportional to 61,931.94, 85,501.50 and 40,772.70 is: 56,289.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,931.94 : 85,501.50 = 40,772.70 : x
  2. Step 2: Convert to fraction form
    61,931.94/85,501.50 = 40,772.70/x
  3. Step 3: Cross multiply
    61,931.94x = 85,501.50 × 40,772.70
  4. Step 4: Simplify right side
    61,931.94x = 3,486,127,009.05
  5. Step 5: Solve for x
    x = 3,486,127,009.05/61,931.94
  6. Step 6: Final answer
    x = 56,289.65

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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.