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Finding the Fourth Proportional to 98,730.90, 148,130.91 and 28,614.42

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Solution

The fourth proportional to 98,730.90, 148,130.91 and 28,614.42 is: 42,931.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,730.90 : 148,130.91 = 28,614.42 : x
  2. Step 2: Convert to fraction form
    98,730.90/148,130.91 = 28,614.42/x
  3. Step 3: Cross multiply
    98,730.90x = 148,130.91 × 28,614.42
  4. Step 4: Simplify right side
    98,730.90x = 4,238,680,073.72
  5. Step 5: Solve for x
    x = 4,238,680,073.72/98,730.90
  6. Step 6: Final answer
    x = 42,931.65

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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.