Home / 102,139.20-153,208.80-70,646.40

Finding the Fourth Proportional to 102,139.20, 153,208.80 and 70,646.40

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Solution

The fourth proportional to 102,139.20, 153,208.80 and 70,646.40 is: 105,969.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,139.20 : 153,208.80 = 70,646.40 : x
  2. Step 2: Convert to fraction form
    102,139.20/153,208.80 = 70,646.40/x
  3. Step 3: Cross multiply
    102,139.20x = 153,208.80 × 70,646.40
  4. Step 4: Simplify right side
    102,139.20x = 10,823,650,168.32
  5. Step 5: Solve for x
    x = 10,823,650,168.32/102,139.20
  6. Step 6: Final answer
    x = 105,969.60

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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.