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Finding the Fourth Proportional to 100,683.61, 138,946.95 and 55,365.04

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Solution

The fourth proportional to 100,683.61, 138,946.95 and 55,365.04 is: 76,405.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,683.61 : 138,946.95 = 55,365.04 : x
  2. Step 2: Convert to fraction form
    100,683.61/138,946.95 = 55,365.04/x
  3. Step 3: Cross multiply
    100,683.61x = 138,946.95 × 55,365.04
  4. Step 4: Simplify right side
    100,683.61x = 7,692,803,444.63
  5. Step 5: Solve for x
    x = 7,692,803,444.63/100,683.61
  6. Step 6: Final answer
    x = 76,405.72

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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.