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Finding the Fourth Proportional to 77,056.35, 115,574.07 and 20,900.07

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Solution

The fourth proportional to 77,056.35, 115,574.07 and 20,900.07 is: 31,347.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,056.35 : 115,574.07 = 20,900.07 : x
  2. Step 2: Convert to fraction form
    77,056.35/115,574.07 = 20,900.07/x
  3. Step 3: Cross multiply
    77,056.35x = 115,574.07 × 20,900.07
  4. Step 4: Simplify right side
    77,056.35x = 2,415,506,153.18
  5. Step 5: Solve for x
    x = 2,415,506,153.18/77,056.35
  6. Step 6: Final answer
    x = 31,347.27

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1.5x scale

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.