Home / 99,415.12-137,196.64-56,981.84

Finding the Fourth Proportional to 99,415.12, 137,196.64 and 56,981.84

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Solution

The fourth proportional to 99,415.12, 137,196.64 and 56,981.84 is: 78,637.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,415.12 : 137,196.64 = 56,981.84 : x
  2. Step 2: Convert to fraction form
    99,415.12/137,196.64 = 56,981.84/x
  3. Step 3: Cross multiply
    99,415.12x = 137,196.64 × 56,981.84
  4. Step 4: Simplify right side
    99,415.12x = 7,817,716,989.02
  5. Step 5: Solve for x
    x = 7,817,716,989.02/99,415.12
  6. Step 6: Final answer
    x = 78,637.10

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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.