Home / 100,875.20-151,312.80-99,838.40

Finding the Fourth Proportional to 100,875.20, 151,312.80 and 99,838.40

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Solution

The fourth proportional to 100,875.20, 151,312.80 and 99,838.40 is: 149,757.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,875.20 : 151,312.80 = 99,838.40 : x
  2. Step 2: Convert to fraction form
    100,875.20/151,312.80 = 99,838.40/x
  3. Step 3: Cross multiply
    100,875.20x = 151,312.80 × 99,838.40
  4. Step 4: Simplify right side
    100,875.20x = 15,106,827,851.52
  5. Step 5: Solve for x
    x = 15,106,827,851.52/100,875.20
  6. Step 6: Final answer
    x = 149,757.60

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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.