Home / 129,300.05-178,392.53-78,296.48

Finding the Fourth Proportional to 129,300.05, 178,392.53 and 78,296.48

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Solution

The fourth proportional to 129,300.05, 178,392.53 and 78,296.48 is: 108,023.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,300.05 : 178,392.53 = 78,296.48 : x
  2. Step 2: Convert to fraction form
    129,300.05/178,392.53 = 78,296.48/x
  3. Step 3: Cross multiply
    129,300.05x = 178,392.53 × 78,296.48
  4. Step 4: Simplify right side
    129,300.05x = 13,967,506,461.07
  5. Step 5: Solve for x
    x = 13,967,506,461.07/129,300.05
  6. Step 6: Final answer
    x = 108,023.98

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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.