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Finding the Fourth Proportional to 117,707.40, 162,417.42 and 77,437.44

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Solution

The fourth proportional to 117,707.40, 162,417.42 and 77,437.44 is: 106,851.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,707.40 : 162,417.42 = 77,437.44 : x
  2. Step 2: Convert to fraction form
    117,707.40/162,417.42 = 77,437.44/x
  3. Step 3: Cross multiply
    117,707.40x = 162,417.42 × 77,437.44
  4. Step 4: Simplify right side
    117,707.40x = 12,577,189,216.20
  5. Step 5: Solve for x
    x = 12,577,189,216.20/117,707.40
  6. Step 6: Final answer
    x = 106,851.30

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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.