Home / 129,015.84-178,032.03-72,416.28

Finding the Fourth Proportional to 129,015.84, 178,032.03 and 72,416.28

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Solution

The fourth proportional to 129,015.84, 178,032.03 and 72,416.28 is: 99,928.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,015.84 : 178,032.03 = 72,416.28 : x
  2. Step 2: Convert to fraction form
    129,015.84/178,032.03 = 72,416.28/x
  3. Step 3: Cross multiply
    129,015.84x = 178,032.03 × 72,416.28
  4. Step 4: Simplify right side
    129,015.84x = 12,892,417,333.45
  5. Step 5: Solve for x
    x = 12,892,417,333.45/129,015.84
  6. Step 6: Final answer
    x = 99,928.95

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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.