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Finding the Fourth Proportional to 134,535, 185,658.30 and 77,979.18

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Solution

The fourth proportional to 134,535, 185,658.30 and 77,979.18 is: 107,611.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,535 : 185,658.30 = 77,979.18 : x
  2. Step 2: Convert to fraction form
    134,535/185,658.30 = 77,979.18/x
  3. Step 3: Cross multiply
    134,535x = 185,658.30 × 77,979.18
  4. Step 4: Simplify right side
    134,535x = 14,477,481,994.19
  5. Step 5: Solve for x
    x = 14,477,481,994.19/134,535
  6. Step 6: Final answer
    x = 107,611.27

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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.