Home / 129,346.16-178,483.20-72,756.32

Finding the Fourth Proportional to 129,346.16, 178,483.20 and 72,756.32

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Solution

The fourth proportional to 129,346.16, 178,483.20 and 72,756.32 is: 100,395.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,346.16 : 178,483.20 = 72,756.32 : x
  2. Step 2: Convert to fraction form
    129,346.16/178,483.20 = 72,756.32/x
  3. Step 3: Cross multiply
    129,346.16x = 178,483.20 × 72,756.32
  4. Step 4: Simplify right side
    129,346.16x = 12,985,780,813.82
  5. Step 5: Solve for x
    x = 12,985,780,813.82/129,346.16
  6. Step 6: Final answer
    x = 100,395.57

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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.