Home / 129,399.64-178,570.14-72,038.08

Finding the Fourth Proportional to 129,399.64, 178,570.14 and 72,038.08

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Solution

The fourth proportional to 129,399.64, 178,570.14 and 72,038.08 is: 99,411.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,399.64 : 178,570.14 = 72,038.08 : x
  2. Step 2: Convert to fraction form
    129,399.64/178,570.14 = 72,038.08/x
  3. Step 3: Cross multiply
    129,399.64x = 178,570.14 × 72,038.08
  4. Step 4: Simplify right side
    129,399.64x = 12,863,850,030.93
  5. Step 5: Solve for x
    x = 12,863,850,030.93/129,399.64
  6. Step 6: Final answer
    x = 99,411.79

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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.