Home / 129,030.42-178,057.41-72,444.18

Finding the Fourth Proportional to 129,030.42, 178,057.41 and 72,444.18

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Solution

The fourth proportional to 129,030.42, 178,057.41 and 72,444.18 is: 99,970.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,030.42 : 178,057.41 = 72,444.18 : x
  2. Step 2: Convert to fraction form
    129,030.42/178,057.41 = 72,444.18/x
  3. Step 3: Cross multiply
    129,030.42x = 178,057.41 × 72,444.18
  4. Step 4: Simplify right side
    129,030.42x = 12,899,223,060.37
  5. Step 5: Solve for x
    x = 12,899,223,060.37/129,030.42
  6. Step 6: Final answer
    x = 99,970.40

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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.