Home / 129,432.19-178,671.53-87,015.32

Finding the Fourth Proportional to 129,432.19, 178,671.53 and 87,015.32

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Solution

The fourth proportional to 129,432.19, 178,671.53 and 87,015.32 is: 120,118.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,432.19 : 178,671.53 = 87,015.32 : x
  2. Step 2: Convert to fraction form
    129,432.19/178,671.53 = 87,015.32/x
  3. Step 3: Cross multiply
    129,432.19x = 178,671.53 × 87,015.32
  4. Step 4: Simplify right side
    129,432.19x = 15,547,160,357.84
  5. Step 5: Solve for x
    x = 15,547,160,357.84/129,432.19
  6. Step 6: Final answer
    x = 120,118.19

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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.