Home / 78,841.20-118,261.80-67,031.40

Finding the Fourth Proportional to 78,841.20, 118,261.80 and 67,031.40

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Solution

The fourth proportional to 78,841.20, 118,261.80 and 67,031.40 is: 100,547.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,841.20 : 118,261.80 = 67,031.40 : x
  2. Step 2: Convert to fraction form
    78,841.20/118,261.80 = 67,031.40/x
  3. Step 3: Cross multiply
    78,841.20x = 118,261.80 × 67,031.40
  4. Step 4: Simplify right side
    78,841.20x = 7,927,254,020.52
  5. Step 5: Solve for x
    x = 7,927,254,020.52/78,841.20
  6. Step 6: Final answer
    x = 100,547.10

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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.