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Finding the Fourth Proportional to 84,943.80, 127,415.70 and 42,953.40

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Solution

The fourth proportional to 84,943.80, 127,415.70 and 42,953.40 is: 64,430.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,943.80 : 127,415.70 = 42,953.40 : x
  2. Step 2: Convert to fraction form
    84,943.80/127,415.70 = 42,953.40/x
  3. Step 3: Cross multiply
    84,943.80x = 127,415.70 × 42,953.40
  4. Step 4: Simplify right side
    84,943.80x = 5,472,937,528.38
  5. Step 5: Solve for x
    x = 5,472,937,528.38/84,943.80
  6. Step 6: Final answer
    x = 64,430.10

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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.