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Finding the Fourth Proportional to 130,402.56, 179,950.72 and 70,785.28

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Solution

The fourth proportional to 130,402.56, 179,950.72 and 70,785.28 is: 97,681.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,402.56 : 179,950.72 = 70,785.28 : x
  2. Step 2: Convert to fraction form
    130,402.56/179,950.72 = 70,785.28/x
  3. Step 3: Cross multiply
    130,402.56x = 179,950.72 × 70,785.28
  4. Step 4: Simplify right side
    130,402.56x = 12,737,862,101.40
  5. Step 5: Solve for x
    x = 12,737,862,101.40/130,402.56
  6. Step 6: Final answer
    x = 97,681.07

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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.