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Finding the Fourth Proportional to 109,658.61, 151,325.82 and 61,916.40

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Solution

The fourth proportional to 109,658.61, 151,325.82 and 61,916.40 is: 85,442.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,658.61 : 151,325.82 = 61,916.40 : x
  2. Step 2: Convert to fraction form
    109,658.61/151,325.82 = 61,916.40/x
  3. Step 3: Cross multiply
    109,658.61x = 151,325.82 × 61,916.40
  4. Step 4: Simplify right side
    109,658.61x = 9,369,550,001.45
  5. Step 5: Solve for x
    x = 9,369,550,001.45/109,658.61
  6. Step 6: Final answer
    x = 85,442.90

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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.