Home / 129,567.15-178,794.80-71,421.34

Finding the Fourth Proportional to 129,567.15, 178,794.80 and 71,421.34

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Solution

The fourth proportional to 129,567.15, 178,794.80 and 71,421.34 is: 98,557.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,567.15 : 178,794.80 = 71,421.34 : x
  2. Step 2: Convert to fraction form
    129,567.15/178,794.80 = 71,421.34/x
  3. Step 3: Cross multiply
    129,567.15x = 178,794.80 × 71,421.34
  4. Step 4: Simplify right side
    129,567.15x = 12,769,763,698.02
  5. Step 5: Solve for x
    x = 12,769,763,698.02/129,567.15
  6. Step 6: Final answer
    x = 98,557.11

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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.