Home / 129,749.25-178,985.98-112,715.25

Finding the Fourth Proportional to 129,749.25, 178,985.98 and 112,715.25

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Solution

The fourth proportional to 129,749.25, 178,985.98 and 112,715.25 is: 155,487.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,749.25 : 178,985.98 = 112,715.25 : x
  2. Step 2: Convert to fraction form
    129,749.25/178,985.98 = 112,715.25/x
  3. Step 3: Cross multiply
    129,749.25x = 178,985.98 × 112,715.25
  4. Step 4: Simplify right side
    129,749.25x = 20,174,449,482.20
  5. Step 5: Solve for x
    x = 20,174,449,482.20/129,749.25
  6. Step 6: Final answer
    x = 155,487.99

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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.