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Finding the Fourth Proportional to 173,916.40, 260,728.80 and 90,810.40

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Solution

The fourth proportional to 173,916.40, 260,728.80 and 90,810.40 is: 136,139.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,916.40 : 260,728.80 = 90,810.40 : x
  2. Step 2: Convert to fraction form
    173,916.40/260,728.80 = 90,810.40/x
  3. Step 3: Cross multiply
    173,916.40x = 260,728.80 × 90,810.40
  4. Step 4: Simplify right side
    173,916.40x = 23,676,886,619.52
  5. Step 5: Solve for x
    x = 23,676,886,619.52/173,916.40
  6. Step 6: Final answer
    x = 136,139.47

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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.