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Finding the Fourth Proportional to 65,128.60, 97,663.70 and 25,665.40

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Solution

The fourth proportional to 65,128.60, 97,663.70 and 25,665.40 is: 38,486.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,128.60 : 97,663.70 = 25,665.40 : x
  2. Step 2: Convert to fraction form
    65,128.60/97,663.70 = 25,665.40/x
  3. Step 3: Cross multiply
    65,128.60x = 97,663.70 × 25,665.40
  4. Step 4: Simplify right side
    65,128.60x = 2,506,577,925.98
  5. Step 5: Solve for x
    x = 2,506,577,925.98/65,128.60
  6. Step 6: Final answer
    x = 38,486.59

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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.