Home / 128,927,145.40-193,334,730.90-42,632,207.80

Finding the Fourth Proportional to 128,927,145.40, 193,334,730.90 and 42,632,207.80

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Solution

The fourth proportional to 128,927,145.40, 193,334,730.90 and 42,632,207.80 is: 63,929,798.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,927,145.40 : 193,334,730.90 = 42,632,207.80 : x
  2. Step 2: Convert to fraction form
    128,927,145.40/193,334,730.90 = 42,632,207.80/x
  3. Step 3: Cross multiply
    128,927,145.40x = 193,334,730.90 × 42,632,207.80
  4. Step 4: Simplify right side
    128,927,145.40x = 8,242,286,422,685,881
  5. Step 5: Solve for x
    x = 8,242,286,422,685,881/128,927,145.40
  6. Step 6: Final answer
    x = 63,929,798.47

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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.