Home / 129,031.32-178,066.38-72,441.24

Finding the Fourth Proportional to 129,031.32, 178,066.38 and 72,441.24

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Solution

The fourth proportional to 129,031.32, 178,066.38 and 72,441.24 is: 99,970.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,031.32 : 178,066.38 = 72,441.24 : x
  2. Step 2: Convert to fraction form
    129,031.32/178,066.38 = 72,441.24/x
  3. Step 3: Cross multiply
    129,031.32x = 178,066.38 × 72,441.24
  4. Step 4: Simplify right side
    129,031.32x = 12,899,349,369.51
  5. Step 5: Solve for x
    x = 12,899,349,369.51/129,031.32
  6. Step 6: Final answer
    x = 99,970.68

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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.