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Finding the Fourth Proportional to 101,048.90, 139,457.88 and 64,280.61

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Solution

The fourth proportional to 101,048.90, 139,457.88 and 64,280.61 is: 88,713.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,048.90 : 139,457.88 = 64,280.61 : x
  2. Step 2: Convert to fraction form
    101,048.90/139,457.88 = 64,280.61/x
  3. Step 3: Cross multiply
    101,048.90x = 139,457.88 × 64,280.61
  4. Step 4: Simplify right side
    101,048.90x = 8,964,437,595.71
  5. Step 5: Solve for x
    x = 8,964,437,595.71/101,048.90
  6. Step 6: Final answer
    x = 88,713.86

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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.