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Finding the Fourth Proportional to 100,810.46, 139,117.34 and 55,487.48

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Solution

The fourth proportional to 100,810.46, 139,117.34 and 55,487.48 is: 76,572.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,810.46 : 139,117.34 = 55,487.48 : x
  2. Step 2: Convert to fraction form
    100,810.46/139,117.34 = 55,487.48/x
  3. Step 3: Cross multiply
    100,810.46x = 139,117.34 × 55,487.48
  4. Step 4: Simplify right side
    100,810.46x = 7,719,270,064.04
  5. Step 5: Solve for x
    x = 7,719,270,064.04/100,810.46
  6. Step 6: Final answer
    x = 76,572.11

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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.