Home / 129,405.60-178,574.73-72,047.17

Finding the Fourth Proportional to 129,405.60, 178,574.73 and 72,047.17

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Solution

The fourth proportional to 129,405.60, 178,574.73 and 72,047.17 is: 99,422.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,405.60 : 178,574.73 = 72,047.17 : x
  2. Step 2: Convert to fraction form
    129,405.60/178,574.73 = 72,047.17/x
  3. Step 3: Cross multiply
    129,405.60x = 178,574.73 × 72,047.17
  4. Step 4: Simplify right side
    129,405.60x = 12,865,803,883.06
  5. Step 5: Solve for x
    x = 12,865,803,883.06/129,405.60
  6. Step 6: Final answer
    x = 99,422.31

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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.