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Finding the Fourth Proportional to 113,807.15, 157,030.40 and 65,399.72

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Solution

The fourth proportional to 113,807.15, 157,030.40 and 65,399.72 is: 90,238.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,807.15 : 157,030.40 = 65,399.72 : x
  2. Step 2: Convert to fraction form
    113,807.15/157,030.40 = 65,399.72/x
  3. Step 3: Cross multiply
    113,807.15x = 157,030.40 × 65,399.72
  4. Step 4: Simplify right side
    113,807.15x = 10,269,744,191.49
  5. Step 5: Solve for x
    x = 10,269,744,191.49/113,807.15
  6. Step 6: Final answer
    x = 90,238.13

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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.