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Finding the Fourth Proportional to 98,916.50, 148,368.59 and 42,717.21

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Solution

The fourth proportional to 98,916.50, 148,368.59 and 42,717.21 is: 64,073.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,916.50 : 148,368.59 = 42,717.21 : x
  2. Step 2: Convert to fraction form
    98,916.50/148,368.59 = 42,717.21/x
  3. Step 3: Cross multiply
    98,916.50x = 148,368.59 × 42,717.21
  4. Step 4: Simplify right side
    98,916.50x = 6,337,892,002.85
  5. Step 5: Solve for x
    x = 6,337,892,002.85/98,916.50
  6. Step 6: Final answer
    x = 64,073.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.