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Finding the Fourth Proportional to 77,118.90, 106,407.90 and 45,269.34

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Solution

The fourth proportional to 77,118.90, 106,407.90 and 45,269.34 is: 62,462.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,118.90 : 106,407.90 = 45,269.34 : x
  2. Step 2: Convert to fraction form
    77,118.90/106,407.90 = 45,269.34/x
  3. Step 3: Cross multiply
    77,118.90x = 106,407.90 × 45,269.34
  4. Step 4: Simplify right side
    77,118.90x = 4,817,015,403.79
  5. Step 5: Solve for x
    x = 4,817,015,403.79/77,118.90
  6. Step 6: Final answer
    x = 62,462.19

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1.5x scale

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.