Home / 145,280.61-218,248.98-86,155.07

Finding the Fourth Proportional to 145,280.61, 218,248.98 and 86,155.07

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Solution

The fourth proportional to 145,280.61, 218,248.98 and 86,155.07 is: 129,427.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,280.61 : 218,248.98 = 86,155.07 : x
  2. Step 2: Convert to fraction form
    145,280.61/218,248.98 = 86,155.07/x
  3. Step 3: Cross multiply
    145,280.61x = 218,248.98 × 86,155.07
  4. Step 4: Simplify right side
    145,280.61x = 18,803,255,833.45
  5. Step 5: Solve for x
    x = 18,803,255,833.45/145,280.61
  6. Step 6: Final answer
    x = 129,427.15

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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.