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Finding the Fourth Proportional to 191,325.20, 287,117.40 and 124,602.80

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Solution

The fourth proportional to 191,325.20, 287,117.40 and 124,602.80 is: 186,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,325.20 : 287,117.40 = 124,602.80 : x
  2. Step 2: Convert to fraction form
    191,325.20/287,117.40 = 124,602.80/x
  3. Step 3: Cross multiply
    191,325.20x = 287,117.40 × 124,602.80
  4. Step 4: Simplify right side
    191,325.20x = 35,775,631,968.72
  5. Step 5: Solve for x
    x = 35,775,631,968.72/191,325.20
  6. Step 6: Final answer
    x = 186,988.60

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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.