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Finding the Fourth Proportional to 103,509.40, 155,264.10 and 70,048.30

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Solution

The fourth proportional to 103,509.40, 155,264.10 and 70,048.30 is: 105,072.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,509.40 : 155,264.10 = 70,048.30 : x
  2. Step 2: Convert to fraction form
    103,509.40/155,264.10 = 70,048.30/x
  3. Step 3: Cross multiply
    103,509.40x = 155,264.10 × 70,048.30
  4. Step 4: Simplify right side
    103,509.40x = 10,875,986,256.03
  5. Step 5: Solve for x
    x = 10,875,986,256.03/103,509.40
  6. Step 6: Final answer
    x = 105,072.45

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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.