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Finding the Fourth Proportional to 109,688.80, 151,368.60 and 61,938.76

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Solution

The fourth proportional to 109,688.80, 151,368.60 and 61,938.76 is: 85,474.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,688.80 : 151,368.60 = 61,938.76 : x
  2. Step 2: Convert to fraction form
    109,688.80/151,368.60 = 61,938.76/x
  3. Step 3: Cross multiply
    109,688.80x = 151,368.60 × 61,938.76
  4. Step 4: Simplify right side
    109,688.80x = 9,375,583,386.94
  5. Step 5: Solve for x
    x = 9,375,583,386.94/109,688.80
  6. Step 6: Final answer
    x = 85,474.39

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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.