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Finding the Fourth Proportional to 145,681.55, 201,040.48 and 85,263.70

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Solution

The fourth proportional to 145,681.55, 201,040.48 and 85,263.70 is: 117,663.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,681.55 : 201,040.48 = 85,263.70 : x
  2. Step 2: Convert to fraction form
    145,681.55/201,040.48 = 85,263.70/x
  3. Step 3: Cross multiply
    145,681.55x = 201,040.48 × 85,263.70
  4. Step 4: Simplify right side
    145,681.55x = 17,141,455,174.58
  5. Step 5: Solve for x
    x = 17,141,455,174.58/145,681.55
  6. Step 6: Final answer
    x = 117,663.87

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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.