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Finding the Fourth Proportional to 77,905.08, 107,509.50 and 59,009.40

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Solution

The fourth proportional to 77,905.08, 107,509.50 and 59,009.40 is: 81,433.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,905.08 : 107,509.50 = 59,009.40 : x
  2. Step 2: Convert to fraction form
    77,905.08/107,509.50 = 59,009.40/x
  3. Step 3: Cross multiply
    77,905.08x = 107,509.50 × 59,009.40
  4. Step 4: Simplify right side
    77,905.08x = 6,344,071,089.30
  5. Step 5: Solve for x
    x = 6,344,071,089.30/77,905.08
  6. Step 6: Final answer
    x = 81,433.34

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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.