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Finding the Fourth Proportional to 91,988.04, 126,948.03 and 56,172.27

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Solution

The fourth proportional to 91,988.04, 126,948.03 and 56,172.27 is: 77,520.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,988.04 : 126,948.03 = 56,172.27 : x
  2. Step 2: Convert to fraction form
    91,988.04/126,948.03 = 56,172.27/x
  3. Step 3: Cross multiply
    91,988.04x = 126,948.03 × 56,172.27
  4. Step 4: Simplify right side
    91,988.04x = 7,130,959,017.13
  5. Step 5: Solve for x
    x = 7,130,959,017.13/91,988.04
  6. Step 6: Final answer
    x = 77,520.50

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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.