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Finding the Fourth Proportional to 64,730.51, 89,315.31 and 40,889.87

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Solution

The fourth proportional to 64,730.51, 89,315.31 and 40,889.87 is: 56,419.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,730.51 : 89,315.31 = 40,889.87 : x
  2. Step 2: Convert to fraction form
    64,730.51/89,315.31 = 40,889.87/x
  3. Step 3: Cross multiply
    64,730.51x = 89,315.31 × 40,889.87
  4. Step 4: Simplify right side
    64,730.51x = 3,652,090,763.88
  5. Step 5: Solve for x
    x = 3,652,090,763.88/64,730.51
  6. Step 6: Final answer
    x = 56,419.93

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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.