Home / 99,369.81-137,130.23-56,928.51

Finding the Fourth Proportional to 99,369.81, 137,130.23 and 56,928.51

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Solution

The fourth proportional to 99,369.81, 137,130.23 and 56,928.51 is: 78,561.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,369.81 : 137,130.23 = 56,928.51 : x
  2. Step 2: Convert to fraction form
    99,369.81/137,130.23 = 56,928.51/x
  3. Step 3: Cross multiply
    99,369.81x = 137,130.23 × 56,928.51
  4. Step 4: Simplify right side
    99,369.81x = 7,806,619,126.53
  5. Step 5: Solve for x
    x = 7,806,619,126.53/99,369.81
  6. Step 6: Final answer
    x = 78,561.28

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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.