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Finding the Fourth Proportional to 77,881.20, 116,821.80 and 48,332.40

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Solution

The fourth proportional to 77,881.20, 116,821.80 and 48,332.40 is: 72,498.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,881.20 : 116,821.80 = 48,332.40 : x
  2. Step 2: Convert to fraction form
    77,881.20/116,821.80 = 48,332.40/x
  3. Step 3: Cross multiply
    77,881.20x = 116,821.80 × 48,332.40
  4. Step 4: Simplify right side
    77,881.20x = 5,646,277,966.32
  5. Step 5: Solve for x
    x = 5,646,277,966.32/77,881.20
  6. Step 6: Final answer
    x = 72,498.60

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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.