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Finding the Fourth Proportional to 130,368.40, 195,790.20 and 77,880.40

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Solution

The fourth proportional to 130,368.40, 195,790.20 and 77,880.40 is: 116,962.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,368.40 : 195,790.20 = 77,880.40 : x
  2. Step 2: Convert to fraction form
    130,368.40/195,790.20 = 77,880.40/x
  3. Step 3: Cross multiply
    130,368.40x = 195,790.20 × 77,880.40
  4. Step 4: Simplify right side
    130,368.40x = 15,248,219,092.08
  5. Step 5: Solve for x
    x = 15,248,219,092.08/130,368.40
  6. Step 6: Final answer
    x = 116,962.54

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1.5x scale

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.