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Finding the Fourth Proportional to 140,258.80, 210,323.40 and 61,332.40

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Solution

The fourth proportional to 140,258.80, 210,323.40 and 61,332.40 is: 91,970.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,258.80 : 210,323.40 = 61,332.40 : x
  2. Step 2: Convert to fraction form
    140,258.80/210,323.40 = 61,332.40/x
  3. Step 3: Cross multiply
    140,258.80x = 210,323.40 × 61,332.40
  4. Step 4: Simplify right side
    140,258.80x = 12,899,638,898.16
  5. Step 5: Solve for x
    x = 12,899,638,898.16/140,258.80
  6. Step 6: Final answer
    x = 91,970.26

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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.