Home / 130,680.84-180,312.09-85,425.45

Finding the Fourth Proportional to 130,680.84, 180,312.09 and 85,425.45

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Solution

The fourth proportional to 130,680.84, 180,312.09 and 85,425.45 is: 117,869.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,680.84 : 180,312.09 = 85,425.45 : x
  2. Step 2: Convert to fraction form
    130,680.84/180,312.09 = 85,425.45/x
  3. Step 3: Cross multiply
    130,680.84x = 180,312.09 × 85,425.45
  4. Step 4: Simplify right side
    130,680.84x = 15,403,241,428.69
  5. Step 5: Solve for x
    x = 15,403,241,428.69/130,680.84
  6. Step 6: Final answer
    x = 117,869.16

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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.