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Finding the Fourth Proportional to 65,294.16, 90,125.19 and 42,636.67

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Solution

The fourth proportional to 65,294.16, 90,125.19 and 42,636.67 is: 58,851.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,294.16 : 90,125.19 = 42,636.67 : x
  2. Step 2: Convert to fraction form
    65,294.16/90,125.19 = 42,636.67/x
  3. Step 3: Cross multiply
    65,294.16x = 90,125.19 × 42,636.67
  4. Step 4: Simplify right side
    65,294.16x = 3,842,637,984.72
  5. Step 5: Solve for x
    x = 3,842,637,984.72/65,294.16
  6. Step 6: Final answer
    x = 58,851.17

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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.